No. These are 2 different towns, Środa Wielkopolska is in Wielkopolski region (Poznań is the main town). It's situated maybe one hour drive south of Poznań, as far as I can remember, but I can't tell you anything about it, I was there only once, passing by from Leszno to Poznań. And it was 11.00 PM, already dark, so it looked like a typical small town.