It's comparable to the CQB in many ways. What the CB has that the Springfield won't is:
1) The Wilson is dehorned. The Springfield has really sharp edges. They can and will eat up holsters and you probably don't want them on a carry gun.
2) The CQB is a Wilson Combat gun. The Wilson name has a lot of, well deserved, cache.
3) The CQB comes with a lot of cool stuff--Wilson hat, gun rag, video, grease, etc.
Of the two, I would probably buy the Wilson. Why? Because I already have a Springfield. The TRP plus the cost of dehorning (and refinishing if nessessary) will cost you as much as the CQB. The CQB will have something like a 6 month wait time.
Just one note, a buddy of mine got his CQB about two months ago, and has noticed that there is a fair amount of holster wear. Not a big deal, but annoying on a $1,700 gun. He did, however, just order another CQB from Wilson (with a shorter barrel), so it isn't a big issue to him.
Billy Ray