Hey everyone!

I was wondering what are the main differences between the Famicom version and the USA one?
I recently got a famicom cart and I'm looking into speedrunning this game but if one is easier than the other I might go for the easier one.
Thanks in advance!

Some of the levels have differences as far as how the levels are built. In the Famicom version you regain a heart after beating a level and due to this and level design differences the game overall is easier.