Continental GTC Speed to Wraith

[dunebuggy]

I'm considering making the above change.
Bentley let me make extended test drives (i've owned a few and go back to the same dealer) and a new GT (2018) is a very real prospect.
I've considered hiring a Wraith (as RR haven't been very forthcoming with a proper test as yet...perhaps i turn up wearing the wrong watch or something!).
If anyone has any feedback on a likely comparison (accepting it's not a convertible of course but i don't fancy a Dawn for some reason) I'd be very interested in hearing thoughts on;

1) Performance
2) Comfort
3) Build (I have a deeply OCD aversion to rattles)

Many thanks

Mike