Right, except that introducing the power meter data, and then having to adjust the trainer resistance based on a potentially different power slope (meter vs trainer) adds a complication since it is likely not a 1:1 adjustment in many cases. It is the same, but more complex with the 3rd variable in the process. The presence of the PM via PowerMatch is a real change, even though they are theoretically the same.
There’s a reason that we have several threads discussing the effectiveness (or lack there of) for PowerMatch. It changes the overall picture of how ERG works enough to cause issues in some (many?) cases.
- One main thread: PowerMatch Experiences