I roller skate on quad skates. I have never tried inline skates. I think that it is definitely different than ice skating though. The jump technique for toe jumps is roughly the same, but for salchow and loop certain skaters might have to adjust their technique more because there is more friction between the wheels and the ground. For example, when I jump a salchow, I don’t have my free leg on the ground as I am cutting the edge. I jump only off of my left leg. It’s the same thing for the loop. Roller skaters are taught not to put their free leg on the ground because it isn’t the more efficient technique for jumping. In addition to the edge jump differences, roller skates are heavier than ice skates as well. So it may be a bit of an adjustment for ice skaters to try to jump on roller skates. It is extremely difficult to jump triples on roller skates, so I don’t know if we will see any ice skaters jumping triples.
Now spins on inline skates I don’t understand very well, so I wouldn’t be able to answer that question. Inline skates are not as popular as quad skates are, so I normally don’t get to watch inline skaters at competitions.