in general, no K2s are horrible in my opinion. razors, deshi, remz, and rollerblade are awesome. USD is pretty good but i dont like them as much. ive skated all these, and right now i have a pair of razors and remz cuz i feel theyre the best.
razors=
-high cuff(especially with Shima liners)like ski boots
-easy/nice backslide plates
-huge soulplates
-simple, which makes them light
-many, many, many options
remz=
-totally differnt from all
-super low cuff
-"freedom of feet" design(look at it on the website
www.remz.com
-very flexy/soft
USD=
-similar to razors
-simple/light
-less "locking" backslide plates
-nice large soulplates
Rollerblade=
-HUGE souplates
-OK backslide plates
ATTENTION:
these are all mostly just my opinion after skating all these skates for a long time