Obviously I don't have the opportunity to do a blow by blow analysis but they seemed to do about equalled well.
I don't share that impression.
Okay, so I just revisited it and I was initially incorrect. Rey actually kills a total of 3 and Kylo kills a total of 5 (Kylo and Rey kill one each during the beginning when they are fighting back-to-back that I had forgot about. There is a total of 8 Praetorian guards.)
The idea that Kylo is better because he fought more of them at once ignores that Rey simply took her opponents out faster imo.
After re-watching the fight scene just now, that's definitely false. Rey is fighting the one dual-wielding dagger-like weapon guard and, in the time she is facing that single guard, Kylo kills three guards (stabs the first one through the chest, decapitates the next one, and stabs the last one in the side when he's using his LS and a Praetorian weapon and gets him to the ground where he murders him. After that, he loses his saber and the guard grabs him) so I'm not sure how Rey is taking out her opponents faster.
When they are both struggling with their attackers who grapple them, that also happens roughly around the same time.
Also, the number of guards matter in this context for comparison. Like I said, we have no reason to believe that the Praetorian guards aren't similarly skilled and Kylo killed three whilst he took on four of them in the middle of when Rey was struggling to defeat just one. I might also add that Rey wounds the dual-wielding attacker that she struggles with and is also wounded in the arm by that fighter after he takes advantage of an opening.