Gdansk or Warsaw?

Both cities have at least their fair share of history and culture - in Gdansk there's an interesting museum about the Solidarity movement and the fall of communism, and the Gdansk shipyard where the unions initially stood up against the government. In Warsaw there are museums about Chopin and the Warsaw rising, to name a couple. Gdansk is certainly the more beautiful city, and has, in my opinion, a friendlier atmosphere. Warsaw feels very much like a capital to me - people rush around and seem a little closed-off. However, it's a lot more lively in the evenings. Maybe I was just going to the wrong places, but both times I've been to Gdansk all life in the centre basically seemed to die off at sunset. Warsaw has rather more to offer.

Warsaw has more museums, more shops, open for longer and more going on in the evening. Gdansk is more beautiful.

When I had a few days spare in Wroclaw I headed south to Klodzko, Kudowa Zdroj and the Gory Stolowe national park. This is really impressive, and the psa town + countryside is a striking contrast to Wroclaw city life. And only a couple of hours by bus.

Warsaw is less "beuatiful" but has more in the way of culture, nightlife and history.

while gdansk is a really pretty old town....better to hold off there till better winter as its also nice to take in all things associated with its proximity to the sea......warsaw would be better

You will find lots of interesting objects in Gdansk
i.e St. Mary's Church-the biggest church made of bricks in Europe),
Amber Museum,
Westerplatte (the place where the II WW started), the place where Solidarity movement was born, the Solidarity Square with the exhibition "The Road to Freedom", the fortress from Prussian and Napoleon's ages a many others.

Thanks, I think I'll go with Warsaw

You can stop in Warsaw for couple of days, that will break your long train ride from Wroclaw to Gdansk.I personally prefer Gdansk, but Warsaw has a lots to offer as well. remember Warsaw is rebuilt after warit was bombed during war. Gdansk is more authentic.
Good luck

Yes Warsaw was rebeuiklt after WWII but Stare Miastre is "as it was" - very hard to tell it isnt authentic.