Bang for your buck, I'd take the EB every day of the week. Faster than the V6, lighter and more nimble, good gas mileage, and with an $8k difference from the 5.0, it could have more creature comforts, or be modded out to be as fast as the 5.0.
Faster than the 3.7 (11-14) is only assumed at this point. Very little doubt it will be faster than the '15 3.7). As far as I know, no one has seen any actual performance numbers yet. No idea how far Ford has fudged the output to make a sale.
A lot of us thought the 3.7 could be easily modded-out to meet or beat the 5.0. A few have succeeded but at a much greater than expected cost. This might end up being a similiar story with the EB. Difficult to say at this point.
But I whole-heartedly agree with you: 5.0 all the way!
Someone will mod the weedeater to 1,200 HP some day, but it won't be me.