Observation: intervals.icu vs TR FTP

Just an observation here but I noticed after my last Ramp Test, intervals.icu (big fan!) calculated my FTP 4W higher than TR.

No biggie and after a couple of VO2 workouts, I think TR nailed my FTP but I am still a little curious about what’s driving the slight variation between the two platforms.

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There is a dedicated thread to intervals.icu that is probably a better spot for your question

The difference is just a difference in estimation of FTP between the two programs (I know that’s what you want to know…the why) but isn’t large enough to be overly concerned about.