Definitely the big puppet if you have to choose between those two.
I'm also using two of those superarmor utility brooch, can hardly notice the difference though.
big pupet is better due to your choice of hitting the buff when needed.
super armor brooch does not stack. infact it will nullify its effect.(i assume this is a glitch).Which is the reason why u will never see it proc. (you just need one believe me it proc most of the time and will refresh under heavy attack even if its mega rank).
Equip only one of them and you will see miracle super armor description coming out from your character as he/she gets hit by mobs...
i believe this goes same to any other proc base brooch...it never stacks and will cancel out each other.
do you see super armor when attacking/skill or when you stay idle under heavy attack? could you post a picture of idle character under lots of hits with super armor popping out while additional tab on?
during certain combo/skill you gain super armor. thats is not consider as brooch super armor.
i have 4 giga brooch super armor and definetely never seen any super armor proc if i stay idle while being hit. after i remove 3 of them, i can see super armor word popping out.
If you have the normal version, level 3 is better as it provides the yellow orb which gives 100% CD reduction.
If you have μ version, level 2 would do, as it provides 100% CD reduction buff at that level. Level 3 will only increase the number of orbs spawned