None, as far as I can see, same troop size, same time...except with all 3 queues running, your supplies will quickly run out...but if i am wrong, someone will correct me
In that case that is awesome... we just need to manage the supplies issue.
My opinion on the changes to the bear is not positive, although I am happy they have made changes based on feedback. The feeding effect is still in no way attractive. How many people will consider selling a pet food for 9KP? I suspect not many. If it were 10KP per NH help chest then you might make it interesting, but I still would use that so infrequently that it wouldn't be good reason to build it.
I know that everyone has different opinions and needs, but the one reason I may find to build the bear is if it was giving me healthy amounts of coins and supplies to aid with catering/negotiation costs, but these are the things that have been removed. Extra pop is nice, if they have increased it enough that it works as a good culture/pop building in its own right. for those short on population.