These are identical structures, just with different flavors of inputs.  Either one could be made to meet the specs that you've given, but there are so many trade-offs implied in your question.  To answer the question as you stated it, but with a large amount of ambiguity, both have merit and both could be better at different times depending on the circumstance.

It really seems like you need to consult a text book first, and one popular one is "Analysis and Design of Analog Integrated Circuits" by Grey, Hurst, Lewis, and Meyer.