In general, Zwift overestimate.
- A major component of estimating your FTP in the two time trail based tests in Zwift is ignored/down played which typically will overestimate. Also the straight adherence of 95% is a fallacy.
- The MAP test, aka ramp, in Zwift is not appropriate for most people. There are three variants of that test and Zwift version is designed for “Elite Male”. The other two is for “Non-elite Male” and “Female”. Again, Zwift using the steepest step variant of the test, will typically overestimate your FTP. The two other version has a longer burn. The author of the MAP test has offered to “clarify” but Zwift seems to be ignoring. Again, the straight adherence of 75% is a fallacy.
- There’s another variant of the ramp test not design by Zwift that out of left field. No idea if it’s any good. It’s a test administered with supervision (lab) so don’t know what else is included. It has a much longer step duration than the ramp test used in conjunction with blood draw and HR. It’s a super long burn compared to other established variant of MAP.
- The in game FTP notification is the worst. Best just ignore it.
Like you, I just started on TR and haven’t done the TR’s test so cannot comment on it.
I had the same observation on the the resistance difference, TR vs Zwift, more resistance in TR?.