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Tell me about Northeastern Poland [29]
If you want to travel you can take a plane so it doesn't really matter whether you go from Wrocław or Białystok.
If you don't want to go by plane, then you need to take a ferry to Scandinavia so you'd have to drive from Białystok as well and though I don't know Podlasie very much I remember driving there was a pain.
Trójmiasto has a Prussian heritage -just like Wrocław.
Podlasie was in the Russian partition but more importantly it was always a melting pot of Polish, Ruthenian, Tatar and of course Jewish influences. Plus the Russian ones during the partitions. It still has a relatively big Christian Orthodox community and even some Polish Muslims.
Also I don't think Podlasie is the most popular destination for wealthy people who would be interested only in luxurious goods.