Assuming you can take out 0.015 per point you'll have to spend approx. $675 in bonus categories to earn $50
Question is if can switch back after a while?
These are in my opinion a replica of each other as you see they even offer you the ability to swap cards.
Just curios why the came out with the unlimited? My guess is they want to stop the freedom (plain) and stop sign up availability. Or I have no clue why they are offering 2 the same cards with each having there own benefit, if you always carry both cards you can maximize by swiping the right one at the right time.