Ya its pretty much the same movement. I'll do a variation on them too where I squat down quarter way, with my torso at about 40 degrees, I rest my elbows right above my knee caps, right in that groove in your quads between the vastus medialis and the vastus lateralis (inner and outer quad) and curl. I saw a video of some guy doing these and gave em a shot. Both are at the same angles so if your at a gym with out that piece of equipment you can use the variation.
There's probably a name for them like "Ukrainian curls"
I just found out stiff legged dead lifts are now called Romanian dead lifts. When did that happen?