My black DX C feels very different from my white C4Y C. The black DX C is way better.
DX C is awesome without lube, pops with a bit of lube, and awesome with lots of lube.
C4Y C is crap without lube, pops with a bit of lube, and pops with lots of lube.
C4Y D is really bad crap without lube, floaty but not fast with lube.
C4Y A is decent without lube, and decent but better with lube.
Rubik's is random.
Here is how I would rank and describe my cubes:
Black DX C: smooth, crispy, fast, controllable, durable, silky
Black DX C-old Rubik’s combo: too fast, extra crispy, not so controllable
Black DX C-C4Y A combo: fast, controllable, not durable
Black Rubik’s 25th Anniversary: extra crunchy, extra controllable
Black C4Y C: Pop, crunchy
Black C4Y A: extra creamy, sluggish, trustworthy, durable
White C4Y A: crispy, locky, smooth
White C4Y C: crunchy, variable, pop
White C4Y D: variable, crunchy, blocky, floating, slippery
Black Rubik’s cube: variable, too fast, slippery, blocky, silky, untamable, locky
Black Rubik’s cube: slow, annoying, locky
By the way, for all my DIYs, I only use the spring and screw, not the washer. The washer has no effect other than making the cube tighter.
Not sure if the adjective list is very helpful.
By variable, I mean I do not trust the quality of the cube in general. Sometimes it is good, sometimes it is bad. Some of the cubes aren't mine, but belong to my cubing club.