Both are great choices.
Erase is a Aromatase Inhibitor and when estrogen is suppressed your body actually recomps while is senses and hardens the muscle. Erase Pro has the same dosed AI in a single capsule as compared to taking three a day. Erase Pro also has a site inhibitor that stops conversion at the site and also an ingredient to help increase testosterone. lMO EP is well worth the money.
Also you can stack it with Alpha-t2, a low stim fat burner to help the recomp, Shift, a no stim fat burner "metabolism enhancer", and even Anabeta which helps increase nutrient use in the clean carbs and lean meats you take in! The new Anabeta Elite has more ingredients to help boost testosterone even more!
Erase Pro, Shift, and Oxy Elite Pro by USP labs would be a sick stack too!