@rolfisicas A video with their lap times would be more useful here.
Take the whole F1 game community and ask them to drive two laps in a row, I'd be willing to wager the majority there wouldn't be able to score two laps in the same 2-3s ballpark 🙃
Without some proper testing or evidence, I don't see this discussion going anywhere. I'm not even thaaat old as some of our fellows here, but I've been around for some good years now and this is the first time I've ever seen this raised up.
So my best guess is there isn't really as much of a veritable parity as you seem to think. From player inputs to the weeds of settings (hardware and software both), small bits like camera FOV to sitting position if playing on a wheel can eat away a lot on what we would otherwise assume as being consistent with a previous go.
If you want to make it easier, set it to automatic transmission, turn on every assist available on the max level, choose a default camera configuration, and just try to drive on the racing line to the best of your ability.
If even so you're consistently getting the same overall difference in laptimes, then we can get on to investigating it further, isolation factors and variables and so on to check if indeed there are different grip levels across platforms
Otherwise I'd chalk it up to confirmation bias.