I just recently got back on the ice after about a 5 year absence, and playing inline exclusively for the last year and a half. I had to buy new pants because my old ones didn't fit great and one of the hip protection pads disintegrated while sitting in the garage during that time (plastic was missing with no holes in the pants

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In short, I didn't like the hockey pants (CCM U+ Fit 07 if interested) after getting so used to the tight fitting girdle in roller. It felt like I would go from no resistance in a stride to suddenly pushing into the material towards the end. This may be more a commentary of the pant, but it also felt like far more padding than I needed for beer league hockey. It wasn't very obvious until I started playing at a drop in game.
So a couple of weeks ago I bought the Warrior Projekt ice girdle from icewarehouse.com with Syko pant shell since a lot of posts on MSH recommended it for a fairly protective girdle with great mobility. I've only had about 4 skates in them, but I have been very happy. It feels just a flexible as my roller girdle, but with significantly better spine protection, hard plastic inserts, and more protective foam. Obviously it is a bit heavier, but nothing to complain about compared to the pants.
Downside of the girdle is the extra heat from it being against the body. Most roller hockey players are going to be used to the heat since a lot of the rinks are either outside or inside without A/C, so you won't notice any heat difference that a pant wearing going to girdle would normally complain about.
If TL;DR, here is the summary. Played ice, quit. Played roller, used girdle, got used to it. Played ice again, no longer like pants, bought ice girdle, love it.
I'd be glad to answer any questions on the gear mentioned here. I feel like I can add a lot more detail, but I didn't want to make the post even longer.