There are differences.
Here is a video of the Kołobrzeg Sunrise Festival
Here is a video of Base music club in Krakow
You can see that in the Krakow ones the Poles have longer noses & generally longer faces & a little darker features.
Most of the ones in the Krakow Base club would be classified as Noric, Dinaric & Pontid phenotypes.
While most of the ones in the Kołobrzeg Sunrise Festival would be classified as more West Baltic, Neo Danubian phenotypes.
But, All & All it seems the Noric Phenotype is common in all of Poland. You see alot of Norics in the Kołobrzeg Sunrise Festival video too.'
Yeah, True Poles are the most homogeneous nation in Central / Eastern Europe. Poles are more homogeneous than Scandanavians are too.
It is interesting that Poles have remained so Genetically pure.
For example Lithuania is 42 percent haplogroup N but Poland is as low as 0 percent N haplogroup in some studies & I believe the highest showed 4 percent N haplogroup for Poland.
The study that put Poland at 0 percent N Haplogorup put Germany at 1 percent N Haplogorup
Russia also has high Haplogroup N. Between 14 & 23 percent of Russia is Haplogroup N.
Also other Eastern Europeans generally have a little Haplogroup Q but Poland has 0 percent Q Haplogorup. For Example the Ukraine is 5 percent Haplogroup Q & Slovakia is 2.5 percent Q Haplogroup & Russia & Czech Republic are 1.5 percent Q haplgoroup
Germany & Lithuania have 0.5 percent Q Haplogroup.
Also other Slavs & Germans have more J & E1b1b haplogroups than Poles. These haplogroups are more linked to Near Easterners.
It is also Interesting that Poland has higher R1a than other Nations in Europe.
My theory is Poland stayed Pure because R1a started & spread in Europe from Poland.
As genetic evidence shows Poland has the oldest R1a haplogroup in Europe. That Russians & Ukrainians & Baltic people like Lithuanians & Latvians get their R1a haplogroup from Poles.
So My theory is Poles at one time were spreading out.
Then when Later invaders came the invaders mostly Assimilated Poles. Germans assimilated more Poles than Germans stayed in Poland.
Most Germans went back to Germany after WW1 & WW2
But, Alot of Poles were Germanized & Thus there is more Polish genes in Germany than the inverse.
It also seems Tatars & Mongols also generally assimilated Poles & other slavs instead of mixing in. As Tatars & Mongols have some R1a Haplogroup like Slavs
Yet, Slavs have no C & O haplogroups like Tatars & Mongols.