Valparaiso or Vina del Mar?

Both cities face the same cold Pacific, at around 15-17°C even in midsummer, and in both the surf closes some stretches to swimming. Neither is a place for long swims.

The difference is what is on your doorstep. Valparaíso's waterfront is docks and breakwaters, so a beach day means taking the coastal train. Viña has Playa Acapulco and Playa El Sol right in the centre, Las Salinas in a sheltered bay and Reñaca's wide sands just to the north, so you can spend a whole summer stay on the beach.

Both cities eat from the same sea and drink the same Casablanca Valley whites, so the difference is in the settings. Valparaíso has the port classics: fishermen's stalls at Caleta Portales, simple picadas serving conger eel soup, and the chorrillana shared over beer in old dockside bars. Its hills have harbour-view restaurants with more ambitious Chilean cooking.

Viña's strength is the coast road towards Concón, which is lined with seafood restaurants and empanada counters famous for shellfish and cheese fillings. In the centre, the parrillas and sushi bars along Avenida San Martín are reliable but ordinary, and locals looking for more interesting cooking go next door to Valparaíso.

For culture, Valparaíso is in a different league. The whole city is the attraction: an amphitheatre of corrugated-iron houses, a UNESCO-listed historic quarter of 19th-century merchant buildings, and funicular lifts that have climbed the cliffs for well over a century. Neruda's La Sebastiana, the naval museum and the murals add to days of wandering.

Viña was built as a garden resort, and its sights match that. The best are the Fonck Museum, with its original Easter Island moai, the Palacio Vergara in its park and Wulff Castle on the rocks. They make a pleasant afternoon, and many visitors staying in Viña take the metro to Valparaíso for culture.

Valparaíso has the edge, mainly because its nightlife does not depend on the season. Students keep it going all year. A night out starts in wine bars on Cerro Alegre and Cerro Concepción and ends in the port bars and clubs around Subida Ecuador, though the lower streets are rough enough late at night that a taxi makes sense.

Viña's nightlife is a summer resort scene. In January and February, Reñaca's clubs stay open until dawn and the Art Deco Casino Municipal adds an old-fashioned glamour, but for the rest of the year it goes quiet. When that happens, its own residents head to Valparaíso.

On nature the two are broadly level, since they share a coastline and its surroundings. From either city you can reach the Concón dunes, sea lions on the rocks, surf breaks that call for a wetsuit and La Campana's palm forests on Darwin's peak, which is a little closer from Viña.

What differs is the direction you head. From Valparaíso, the cliff walks run south to Laguna Verde and Quintay, and boat trips leave from the harbour. Viña's walks run north along the Reñaca to Concón shore, past the viewpoint at Roca Oceánica, and the National Botanic Garden is on the edge of town.

The two share almost the same list of trips: the Casablanca wineries less than an hour inland, Neruda's house at Isla Negra, the villas of Zapallar and Cachagua, and Santiago about an hour and a half away by bus.

Viña has a slight advantage because its closest day trip is Valparaíso, a UNESCO-listed city fifteen minutes away by metro, worth a day or more of anyone's time. Going the other way, Valparaíso's nearest trip is Viña's gardens and moai, which make a pleasant outing but a smaller one.

Viña is much easier with children. It has calm water at Las Salinas and Caleta Abarca, room to run in the Quinta Vergara, horse-drawn carriage rides and flat streets for a buggy. It still lacks a zoo or theme park, but as a relaxed beach stay it works well.

Valparaíso has moments children love, such as riding the funiculars, a boat trip past the ships and spotting murals. Getting between them means steep stairs, broken pavements, narrow streets and street dogs, so many families stay in Viña and visit the port for a day.

Viña's centre is flat and laid out on a grid, so the seafront, the park and the shops are all an easy walk apart. The Merval metro links it to Valparaíso. Reaching Reñaca and Concón is harder, because the single coast road jams in summer.

Valparaíso is compact but vertical. The lower town is flat, but every hill means stairways, and you rely on funiculars that do not always run, shared colectivo taxis and buses to climb. The old trolleybuses along the flat streets are a charming extra.

Neither city is a shopping destination, but they cater to different needs. Viña has the practical shopping, with Avenida Valparaíso as the high street and large malls full of Chilean and international chains.

Valparaíso is the place for anything with character: prints, ceramics and lapis lazuli from the studios on Cerro Alegre and Cerro Concepción, and old maps, vinyl and nautical bric-a-brac at the weekend market near Plaza O'Higgins.

Valparaíso is a little kinder to a tight budget, as long as you stay in the lower town or the quieter hills. There you find family-run guesthouses, cheap set lunches in the picadas, and funicular and colectivo fares that cost next to nothing, and much of the sightseeing is free. Prices rise only on the boutique hilltops.

Viña's costs depend on the season. In January, February and on long weekends, demand from Santiago pushes up the price of sea-view rooms. Out of season, the same hotels are much easier on the wallet.

The two are level here, and both send serious opera and classical music fans to Santiago. Each has a Teatro Municipal for concerts and ballet, but their best live music is very different.

Valparaíso's is informal and its own: cueca porteña, boleros and old waltzes played in traditional bars where locals join in, with buskers on the hills and theatre at the old prison arts centre. Viña's highlight is one big event, the International Song Festival each February in the Quinta Vergara amphitheatre, which brings Latin pop stars and fills the city.

Neither city has a bathing tradition. There are no thermal springs, hammams or public baths, and the cold sea is for a brief dip rather than a long soak. Valparaíso is the harder place to unwind at any time of year. The working port, the steep climbs and the student nights keep the same pace in every season, and treatments come down to a few massage rooms in boutique hotels on the hills.

Viña is the better choice, but timing matters. In January and February, when visitors from Santiago arrive, the central beaches fill, the coast road to Concón jams and Reñaca stays up until dawn, so summer is no quiet escape. From autumn to spring it settles into a sleepy resort town, and its larger hotels have the only full spas on this stretch of coast, which is as close as either city gets to a wellness break.