To be fair, I don't know either of these well, but I doubt the 5th channel on the Extra Easy is worth the $60.

This is a trainer you're looking for, and if the fifth channel is for flaps, you don't need them. If the fifth channel is just sitting there, save your money.

It IS worth buying say, a six channel computer radio, like the Futaba 6XAS. But if the Alpha comes with the 4 channel for $310, that would be my recommendation.

Find a club, and an instructor, good luck, and have a blast!!
Dennis-