Note: There are sellers / users that don't make merged profiles like intended.
Some just make additionaly direct am profiles and only copy the studio cab and save it.
Some use many direct amp profiles, all with the same cab (which was profiled with another amp). Only cab copied and saved again. Or hit merge button, which is totally wrong in that case.
Others make studio profiles, than later connect a colouring di box for making direct amp profiles.
Merging now gives a slightly different result.
Others tell you the profiles are "merged", but they mean by that using studio profiles and just copy any IR / cab preset and save that as a new rig.