one using sazabi frame and other is using zaku frame.

ur referring to elyn? Now i cant confirm this as i dun own 1, but from what ive seen so far non has posed in an action pose. Its just it standing straight with the binder's either spread open or close. Now i kno the binder is not lock in a set of position u can move it around but all the pics that ive seen so far hav its arm just straight down. Can the whole arm move around like normal mg with the binders attached? Can it hold its position say stretch out the arm perpendicular to its body (for the lack of a better example, can it do something similar to a nazi salute)? I'll like to be proven wrong on this but at the same time i wouldn't be surprise if it cant; just means it sacrifice possability with stability. While i dun particularly care wit it sacrificing possability as i think it still looks beautiful just standing there liek a boss, but Bandai themselves do as of late, and this could be whats holding them back. 

we hav to see how the new sazabi is done. Its the 1st big kits post 2.0 (the-0 doesn't count, its made with old design from as far back as 2004) if this is done well, it'll open the flood gates for future big kits; and this includes the "totally-not-zeong" sinanju we got a glimpse of in epi6. Surely bandai is thinking how to milk unicorn further. If tey introduce someting so huge so hype but at the same time cant replicate in model form then tey just shoot themselves in the foot.

how come the sazabi looks (I means overall impression) identical to the older version, except more details...