Harry Potter:
Broomstick

Transformers:
08 Camaro

that turns into this
http://games.fok.nl/showpic/1165581621.2288.jpg
Transformers win
Women
Harry Potter:
Emma Watson

Transformers
Megan Fox

Rachel Taylor

Transformers win
Main Character
Harry Potter vs. other guy
Harry Potter wins
Evil Character
Voldemort vs. Megatron
Transformers
Action
Transformers wins for bad ass robots and kick ass fighting
Plot
Harry Potter wins based on a good story line
Final Score:
Transformers 4
Harry Potter 2