That´s not the usual experience with those tires and also not what I found.
Normally, the GP5000 is waaaay harder to install than the pro one. I even heard about bikeshops refusing to mount those tires on certain rims. My experience is similar. Last season I rode the Conti tire. Was sooo hard to install. I had one thumb bleeding and we could barely get it on with two strong guys (and yes, I know how to install new tires, but this one is definitely different).
This season I installed the schwalbe tire. Can´t say much about the road feel by now, but mounting them on the same rim was very easy. Did not need any tools or whatsoever.
In my opinion, the advantage of the conti is the puncture protection. The advantage of the Schwalbe is the weight and the easy mounting. Rolling resistance differences seem to be neglectible.
And for road racing, I would even consider to mount the pro one tt if the road surface is good enough.