RCCl vs Carnival cruising with infants

We have booked the Allure of the seas for an early December cruise. We had originally chose Royal because our kids will be 6 months and 2 years and they could both be sent to the nursery. We now see that Carnival has a camp for those over 2 and are wondering if it would be more advantageous for us to switch to Carnival (probably Magic) so that our very rambunctious toddler could enjoy Camp Carnival.

Last time we vacationed with a six month old, it was a breeze, so I don't think not having a nursery for the younger one is a deal breaker but it would have been nice to have the option (I see they do offer the service after 10pm which we would also use).

Looking for opinions on which ship you would work best for us.

It's really an "either/or" thing. Both lines are more similar than different....but Allure will be larger, with many more "bells and whistles"....I would choose by price/room type/destination.....in whatever order is important to YOU!