Martin, looks like your conversion from sportsbikes is complete!! Of course us seasoned converts always knew it would be.
I've got Comfort seat sitting waiting to be fitted. It does seem slightly thicker and as KB says has supposedly got a gel core. I'll update you in due course. It also looks good inasmuch as it has almost a lighter grey coloured alcantara-like insert with in addition DP logo embossed on it.
I've got to say that Sargent seat that KB is referring to looks pretty cool although from what I've seen of Corbins effort on Multistrada.net web-site it looked pretty hideous. Too much like a Harley seat in style and even had a detachable back-rest.
Cheers!