^^^^Being a long time POG user and an occasional 6.1 Classic user, I agree w/ you completely that they feel very similar. What you noticed IMO is that the open string pattern of the POG adds spin the 16x18 or 18x20 Wilsons don't have. I'd suggest the power and stiffness/feel are nearly identical other than the spin potential.
Back to using POGs. Why did I ever leave you dear friend?