I'm assuming you're talking about MP-M01 Starscream, and not MP-03. In which case, yes, they're the same basic toy. The MP version is based on the Movie 1 deco, though, and features many more paint details. The Leader version instead has the RotF "tattoos".
Hasbro MP Starscream (Left) Hasbro Leader Starscream vs (Right) Takara Movie MP Starscream Hope this helps?
Pretty much. The paint is way more accurate to an F-22. I tihnk there's like a $40 in price. Or was it $60?
BBTS has the MP version at $99.99 so closer to $60. I am holding out hope that Hasbro will eventually release Leader SS with a paint scheme closer to the Takara MP version down the road.