LEADER MEGATRON
PROS
-very poseable in robot mode: head, shoulders (2), biceps, elbows, wrists, hips, knees (2), ankles
-phrases, sounds, lights
-when he talks, you can push the Decepticon symbol as you wish to synchronise the mouth with the speech
-fusion cannon
-swords
-Headmaster-compatible
CONS
-transformation is way too lazy and simplistic for a Leader, especially coming after Movie Leaders
-helicopter mode isn't the best... tail looks unfinished
-2nd front landing gear is useless
-Headmaster fits but doesn't trigger any new phrase
-unpainted Decepticon symbol (could still have been purple or translucent purple)
LEADER BULKHEAD
PROS
-decently complex transformation
-nicely poseable: shoulders (2), biceps, elbows, left claw, hips, knees (2)
-lights, sounds and phrases
-gimmicks (blade and claw) work very well
-Headmaster
-chair mode!
-missiles and turret cannons
-better detailed than the Voyager version with tank threads under the feet and rivets and bolts everywhere in truck mode
-super transformation (slower and "crunchier" version)
-in truck mode, the siren will go on as long as you will hold down the button
CONS
-head can't be posed
-head turns to the left while talking... it looks a bit stupid
-you cannot synchronize the mouth with the speech as unlike Megatron, every time you push the button it jumps to the next phrase
-Headmaster doesn't have a robot mode
-saw blade is only painted on one side
-turret can't turn (that's understandable though)
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Do I like Megatron? Yes. I don't care much for the chopper mode but the robot mode is excellent. Still far from being the ultimate incarnation as others have been saying. In my book, MP-05 is still the best; as for a mainline Megatron, I think I still prefer Movie Megatron (despite not being as poseable - at least there's a transformation going there...) and G1 Megatron (I still can't believe how complex/clever that toy is despite its age).
Do I like Bulkhead? Yes. More than the Voyager version? Yes. If the head could be posed, it would be perfect. Some are complaining about the saw hand, I think it's really cool. For me, Bulkhead is far superior to Megatron as a Leader class figure. Better transformation and more features for the same price.