I have used both (TC version of the SST), I think without a doubt the Barnes is better.
But (always a but), you are way less apt to get a pass through with the Barnes. They open up and put a hurting on game, but in my experience, you usually recover them. As such, depending on the shot placement, you don't always get a good blood trail. But they also don't go very far either !!!
This is pretty much what the barnes look like, and we have more than a few of them...
My brother has used the same combo and he also has a nice collection of Barnes MZ bullets.
Bottom line, they both work. If I was going to drive them fast...like 2000+mv, I think I would use the Barnes.
My mv with the TC Shock Waves is in the low 1900's, usually around 1933 and they usually punch through a WT.
Another option is the bonded TC Shockwave. I have had excellent results with the bonded SW.
I finally have a load that my Omega likes with the 250TMZ....110 Blackhorn 209 + the 250 Barnes TMZ gives me about 2010MV and 1.25" groups at 100.
I used to shoot the 250 Barnes ez-expander out of a 700ML with Pyro Pellets and it was truely a sub-moa load. I freaked more than one dude out at the rifle range shooting my 700ML and that combo !!! Something like "WTF are you shooting"......just an off the shelf Remmie 700ML......I got some groups with that settup that were scary....
Still have that rifle and would use it more often but it is a royal PITA to clean. My son now uses it (and I still get to clean it !!!!!)
Tony