To talk a little bit about the why of them being different… different trainers will have different relationships between speed and resistance. For dumb wheel on trainers, in general fluid trainers will see bigger increases in resistance for the same change in wheel speed than magnetic units. Some trainers can have adjustable resistance for the same wheel speed.
Wheel off trainers have an even more fluid relationship with ‘wheel speed.’ Smart trainers in erg mode will give you the same resistance regardless of what gear you’re in or cadence you’re using, but in theory gearing x cadence would be your wheel speed.