Kenrith’s Transformation says “Target creature’s power and toughness becomes 3/3.” When you cast that on a stack of tokens, each reinforcement becomes a 3/3 (e.g. a 10x stack of 1/1s becomes a 10x stack of 3/3s; so PT equals 33/33).
Taranika says “The first other creature you control gains Prevent Damage until end of turn. Then, its power and toughness becomes 4/4 until end of turn.” When that trigger targets a stack of tokens, the stack loses all buffs and becomes a 4/4 regardless of how many times it was reinforced (e.g. a 10x stack of 1/1s becomes a 10x stack with a total PT of exactly 4/4).
The portion of the card that impacts P/T is worded identically on both cards, yet they do not have the same outcome. Which one is working correctly? And I’d like to submit the other as a bug. 
(I’ll just add that I hope Taranika is bugged. Otherwise… woof)
