it’s like night and day. it’ll take some adjusting. and A LOT of spending (lenses, sound gear, rig to get it stable) but it’ll be worth it in the end.
it won’t be easy, but the picture quality is amazing and once you crack it, you’ll be happy with the decision.
but don’t for a second think that because a dslr is smaller it is more practical. the amount of gear you’ll have to take with you for it to match the capabilities of a comcorder will negate the size advantage that it has.