If Wilson fit and finish are important, or if you feel a need for the 'Wilson prestige', then go for it.
It is unlikely that you will shoot any better with the Wilson, unless you are a serious competitor.
You did not say which Wilson you are craving? The price can certainly vary a couple of thousand on the way to the top end.
If you just want a Wilson of some sort, consider posting a WTB for a Wilson KZ45 or KZ45 compact. Good used ones are 500-700 cheaper than the steel ones, if you can find one.