I don't have access to my computer until next Wednesday, since I'm currently traveling and it's a pain to compile all that on a phone. But yes, once I'm back I can absolutely provide you examples that show Nicko's fluctuations on TFP being much more egregious and substantial than his average playing over the last four decades. I can show that, relative to the song's intended tempo (where a click track is irrelevant anyway), Simon adheres closer to what he's supposed to be playing compared to how Nicko played on TFP.
I can also compile videos of instances where songs almost fell apart during TFP, including moments where Adrian stopped playing in frustration. Furthermore, I can add videos from RFYL where Steve and Bruce fucked up and Simon was the one to salvage their mess. Those things were well documented after all.
So, sure. If you give me some time I can absolutely substantiate my claims. Because as I said: Claiming someone is objectively worse or better than someone else in general is nonsensical, while comparing specific criteria like keeping time, is something we can objectively determine.