Originally Posted by
RChung
Here's a comparison of my Performance brand rollers and a Cycletek M1 fluid trainer, with power measured by my (calibrated) PowerTap hub. Each dot represents a 1-second reading.

Wow, thanks.
I sometimes do GCN 1 hr workout where you run progressively higher resistance.
On rollers, it works by running through the gears, & you have higher rpms to get similar effort.