My answer may seem strange to many of you, but if it really is about resolving dysphoria, then I'd be happy with either procedure. If it's about more than just resolving the dysphoria, that tells me my decision would be based on something else entirely.
I think it would be amazing if I could flick a genetic switch and become as close to being female as is possible with a biologically male body. But equally, if, as is claimed in this thought experiment, gene therapy would allow me live happily as a male, then that's exactly what I would expect to happen -- me living happily as a male, nothing more nothing less. Of course, if these procedures did ever eventuate, I would have a serious look at what was involved before choosing which way to jump.