the past couple of rides I’ve used my wahoo speed sensor for TR and allowed zwift to read the cadence from the Hammer, I’ll have to try and run a comparison and post here. The reason why I used the cadense sensor was that the other day I was having trouble keeping my cadence up, partly it was that my legs were more fatigued than usual but I also feel that when the cadence reads lower I feel the resistance firing a lot more on my trainer. This might be entirely psychological and more a byproduct of how I was feeling vs an actual attribute of the trainer. I’m rambling, but in short I do think trainer estimated cadences tend to me a little lower than a dedicated cadence sensor, by how much exactly I’m not sure, but I’llcheck!
edit: just checked, yesterday my Hammer sensor had me at 88rpm average cadence while the wahoo was 89, so it’s close overall, I’m sure looking more closely using something like DC Rainmaker’s analysis tool would reveal some areas of difference, but overall it’s quite close