I have tried both PICs (4 wheel version) and Snow Whites. I prefer the Snow White because my feet are small and the back wheel of the PIC stuck out too far so I tripped over it. If your feet are bigger this wouldn't be a problem.
Forward 3 turns are easy in both but I thought backward 3 turns were easier in PICS because of the rockered back wheel.
I don't like spinning in either because I can only do it "ice style" which means I go up on the toe stop. The Snow White toe stop has an adjustable height which is good especially if you skate outdoors since they wear away FAST. I found I can jump and spin much easier on the snow white if I adjust the toe stop quite low, but then it is too wide so if I go on a deep edge it catches and I trip.
I can do rockers, counters, 3turns and brackets on both, once you get used to them it's pretty similar to ice and I think the roller skates improved my turns on the ice.
The weight doesn't bother me on PICS or snow white you just get used to it and it's good over training so my ice jumps were higher.
One thing I don't like about inlines is that you have to land your jumps flat footed - not on the toe stop- . If you try to land forward on your toe like you do on ice you fall...
Because of the big toe stop I think toe loops are easier on snow whites than on ice, waltz and salchow are about the same, I struggle a little with loops because my backspin isn't great on snow whites, flip is ok, i can do axel without crossing my feet and I can't get my double sal on wheels yet but I think it's just a fear issue.
It's much easier to spin and do everything indoors, I practice spinning in my living room but never outside because it wears away the toe pick... I am almost able to spin roller style now ...off the toe pick... Then I will spin outside
Anyway edges, power pulls, cross overs, all that stuff is pretty transferable from ice to wheels. In Germany the rinks are closed 6 months out of the year so for me it's wheels or nothing. I love skating outside alone during a sunrise .. It's not as good as ice but it's the next best thing.
I am curious about trying quads at some point too. SORRY this is so LONG. I just think about this a lot!
Happy skating everyone!