Hi Diana,
You'd have to describe the machine a little more so i can be more precise. But I'm assuming it achieves this by allowing you to work at more of an incline, rather than horizontal?
If this is the case, then just consider the strength-curve, i.e. which range of the movement is the most/least intense, and also loading-angle (i.e. diagonal vs. horizontal). I would personally alternate both each session, or maybe start with a couple of sets of Harop, then go to your Nordic curl machine.
The horizontal, and particularly working the V2. variation, is going to keep up exposure to maximal intensity. But then your machine ma allow you to work through a greater ROM at the knee angle. So, both have complementary benefits.
The straight-line eccentric with a push-assisted concentric is also a valuable progression. Over time, pushing/assisting with the hands lower down toward the hips and with less assistance can really help to bridge the gap.
With hams of power & knees of steel!
J