Calories burned ?

I was checking the exercise log and I'm not exactly sure where this fits in so hopefully someone might be able to help!  I'm on a roller derby team and we practice 4-6 hours a week and I'm also doing 1 hour (or more) of practice skating 5x a week.  

Plain old roller skating is listed at 539 calories per hour... and rollerblading (for some reason) is listed at 925 per hour.  I used to do inlines for hockey and don't see how the 2 are so different, but, whatever that reason is.. I'm on quad skates and not inlines.  The 539 just seems so low given the intensity.  The workout is extremely fast paced.  We do sprints, intentional falls, squats etc and there is very little downtime.

If I look at the numbers for speed skating, it lists that out at 1156 per hour, but I don't know if that's traditional (ice) speed skating since it wasn't specified.  I don't own a heart rate monitor so I just need to figure out what I'm burning so my deficit doesn't get too high and I end up under-eating again

I'm thinking they're probably assuming that you'll be skating faster with inlines than with quads, which is why the calories are a lot higher. i'd say just go with the rollerblading.

or if you are worried about over estimating your cals, maybe do half inline half quad?

Rollerblading burns more, it's hard to both keep your balance and move forward fast. Roller skates are more stable and not as heavy as rollerblades. Skating on ice does not compare to skating on asphalt, the amount of friction is very different.