Have them both, prefer the S&W's
The Trooper has locked up on me before, don't know why but it required the side plate to be removed and a disassembly/reassembly to remedy.
The fact that the new Python, which is based on the same lockwork as far as I know, has had similar locking issues, leads me to believe its not an isolated event.
I've never had a S&W do the same.

Other than that, the two Troopers I have have had both had comparable triggers to my most of my S&W's, with a few of my Smiths being slightly superior. The troopers weren't noticeably more or less accurate, and other than the locking issue were fine shooters.

The firing pin issue with the Trooper is disconcerting, especially considering its a factory fix, and I don't know if Colt even has the tooling or parts to fix. It requires a new firing pin and bushing to be pressed into the frame, and I've read that Colt no longer has the jigs to support the frame or the firing pins and bushings to replace...maybe that's changed since the new Python has gone into production.