Ease of Continental road wire bead tire mounting and dismounting
In my experience, Continental-brand tyres are neither difficult nor easy to fit when new.  They certainly require leverage tools like tyre levers or similar, but they're much easier than a Schwalbe Marathon.

I've fitted both GP4000 and Gatorshell tyres in the last year or so.

Personally I prefer kevlar bead tyres now over wire bead for weight, ease of fitting, and easier postage.