Yes, Thanks for all your responses. This is What Alex said to me:
The Super Compact will go as loud as the original Compact if you use a more powerful amp. The Big Baby 2 is no louder than the Super Compact.
The big baby 2 is larger so it can go lower. Super Compact is a standalone solution for many bassists, particularly anyone who used to use an original Compact.
The Puma 500 isn't a very powerful head.
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I though that big baby 2 can manage more watts...