True that the queen in Resurrection was in a vulnerable position but even so I still think that it was the stronger and the more evolved of the queens.
Aliens are definately stronger than normal humans, but the cloned Ripley wasnt your typical human (even pre cloned), with some new nifty powers like strength, speed, agility, acid blood, regeneration, psychic ability and a connection to the hive.
I from the limited footage of the newborn I wouldn't be able to comment if indeed it was faster/stronger. But I would say that it would at least match it with both the preds/predalien.
I do agree with the lack of tail which would put it at a disadvantage. Still its advantages far outweigh its disadvantages. Even at a young age the newborn was more curious and showed cunning and understanding i.e. lifting the door on Betty (the ship) and not bashing itself through, closing the door to initiate launch, and the ability to follow spoken (human) directions.