For the first example in this thread, I'm betting Yamamoto composed the score for Supersonic Warriors, since DBZ and plagarism are kinda his deal.
As for another musical similarity, I always thought the riff from Final Rush kinda sounds like the riff from Paperback Writer, just in a different key.
Final Rush
Paperback Writer
http://youtu.be/taADLPtyDb0?t=4s