I’ll offer a very slight counter/addendum: 101s initially seem unrideable on anything other than perfect concrete, but in my experience they break in really nicely. The shape of the wheel seems to matter more with the 101s, for me: my 52 conical fulls are great wherever, my 51 classics are much slower on choppy ground.
I currently prefer 101s, but I skate small wheels, and seek out smooth (ish, northwest outdoor non skate specific) parking lots for flatground. So big grain of salt so to speak