Hammer time

How does one choose a big wall hammer?  Do they have all the same feature? Weight?

I've looked at the grivel Thor and petzl bongo. Not sure what else is there

Newbie aid climber here

I bought the edelrid hammer.
it was the cheapest option with a wooden handle.
the head seems fine, decent weight but not too heavy, and it comes with a long dynema drop line.
the handle sucks though. I’m going to pull the head and replace it.