Wrong plane 4 birthday
If my wife bought a plane for me to build because SHE liked it for whatever reason, Id build it, however, most hobby wives I know, know squat about airplanes, so, its possible your wife bought you the plane to show support for you and the hobby you enjoy.
If this is this is the case?, its possible you could replace the plane with the one you want with the wifes support?
I wouldnt tell the manufacturer what kit you had before asking if they would allow the return of a gift in order to purchase another kit they have ,this way, for them, unless they ask, its a gamble that you want to spend MORE money.