No different to what could happen between any other engine or belt manufacturer with all pulleys keyed.
Indeed, which is why in a quest for greater accurance thats no longer how most engines are timed!
You may as well unplug your dephasor and say thats no different to an older technology engine as well, lol.
Try doing a belt on a quad cam v6 with no locking pins or dialing in a rotary fuel pump for 1mm lift on the cam with 3 degrees before TDC and a Clio belt is a pisser.
Yeah, plenty of harder engines to work on, in fact the F4R is simple its only it being in a clio bay that makes it awkward.