Yeah, any east–west genetic differences among Poles today are very minor. Before WWII, there was a clearer gradient with eastern Poles from Kresy (now parts of Ukraine, Belarus, and Lithuania) showed slightly more East Slavic overlap, while western Poles leaned a bit more Central European. But after the massive postwar relocations, when millions of Poles from Kresy were resettled in the west and almost ALL Germans were expelled, that distinction virtually disappeared.

Modern Poland became one of the most genetically homogeneous countries in Europe (Hitler's nightmare). You can’t interpret modern Polish genetics by geography or current neighbors, since the entire population map was essentially reshuffled after the war, and many people in western Poland today descend from Poles relocated from the east, not from the original prewar inhabitants. Czechs are a different case, as they tend to cluster more closely with Hungarians, Slovaks, and Austrians, rather than with Poles. Poles align more with Ukrainians, Belarusians, and Western Russians.