I have a SFV4S and have just bought a Diavel 1260S as I was disappointed with the Diavel V4 if I'm honest
You can make the SFV4 more comfortable by adding Ducabike risers 20mm and the comfort seat but that doesn't change the fact it's still a missile
The Diavel 1260 is a bit of a Torque monster and is very aggressive in Sports mode and is actually quite a nice cruiser in Urban mode - best of both worlds - it's more comfortable that the SFV4 that's for sure and can do 170 - 180 miles on a tank - it is also confidence inspiring round bends as you have twice the level of grip at the back end so can power on earlier
It's a great useable bike see if you can test ride first
Where are you located?