You'll forgive me, I hope, for pointing out that your question sounds like you're trying to do things a little more mechanically, not less? Why not just get on a bike, cycle until you feel like you're putting in roughly the same effort, and check your cadence at that point? Or skip looking at the cadence--just cycle until you feel like you're putting in similar effort?

I also suspect that you wouldn't get a good answer from another person--me going 4.7 m.p.h. with a 3% incline might be a nice, relaxing warm up, but my sister doing the same thing might drop dead from heart failure. Our stride length will also be difference since she's significantly taller than me. If you want to be able to compare cadence to stride, you'll probably have to compare your OWN stride to cadence.

What the heck is a "pre core striding machine with adjustable cross ramp and resistance" anyway?

Sarah