For people who are lazy, take a quick look:
Magma Man: http://megaman.wikia.com/wiki/Magma_Man
Needle Man: http://megaman.wikia.com/wiki/Needle_Man
Similarities: Jewel where mouth should be, no hands/two busters, vents on side of body, eyes inside an indent above jewel, bulkier upper body, has their weapon on top of their head.
Differences: MAGMA MAN USES FIRE WHERAS NEEDLEMAN DOES NOT. Oh, I guess one is red and the other is blue too
I thought the Wave Man thing was okay, what's one or two reused things, right? Makes you think back right? This is just too much -_-.
Tornado Man also looks similar to Gyro Man (both green, have a propellor on some part of body) although still somewhat different (wings on head, face, etc).
Concrete Man basically is Stone Man and Guts Man together.
XI Wiki


