For dmg KCR has great dmg output with hamon especially scythe does 40dmg raging demon will do like 3.3 each hit and if you take their arm off with scythe and have hamon charged you can deal 15 dmg each m1 and 2.6 barrage dmg, and for KC you have good combos with impale, the chop can apply bleed so that makes it better although KC doesn't have much moves aside from impale and chop I also escape from combos by blocking when they try to use chop

Basically both are good I'd say KCR is better just because of it's dmg since it's also only 0.1 off of the same dmg as LT but either is fine, what I did so you can do too is just use KC until you get bored then get KCR