Anybody try either one of these guns?What is the recoil like and how hard are they to conceal?

IIRC, the S&W 2" 45ACP is a Large frame, whereas the Taurus is a small frame. I'm sure the Taurus is easier to conceal due to its size.
S&W is stainless steel, which is considerably heavier than the Taurus Total Titanium.
I've yet to shoot one so I can't comment on the recoil. Neither of them are meant to be shot much, therefore recoil isn't a big issue.
They are both "purpose specific" revolvers.

I've been trying to decide between the 625 vs Tracker for a couple months now. I'll have a 45 wheelgun eventually...

The characteristics of powder utilized in commercial loadings available for the 45 ACP requires a barrel length of around 4 inches to extract decent velocity.

A 2" barrelled 45ACP hobbles the round while providing an unnecessarily large package for the power it delivers.