I have a black large tri top and recently got a black large 988 binder from underworks.
The 988 is the chest concealer one that looks similar to an undershirt. I am 5'5" and 240lbs. My ribcage is 40 inches and my moob area is 43 inches. The 988 has double compression in the front and back. The tri top is 3 layers in front and only 1 in the back.

Tri top
pros:
easy for me to get on
binds really well, but not to tight
easy to breathe in
no armpit cleavage
cons:
rolls really bad- i cut it, but that didn't work so I wore it backwards then safety pinned it to an undershirt which worked.


988
pros:
binds really really really well, too well for me
thin shoulder straps and lower neck line
doesn't roll up
cons:
makes my belly bulge
gives me epic armpit cleavage
hard to get on
hard to breathe in

Some pics:

no binder

tri top binder

tri top binder by itself

988

988 by itself

988 by itself