Maybe to a lesser degree, given economies of scale, market size and so forth, but it will hurt the US too. Trade agreements aren't altruistic. There's mutual benefit, or there'd be no point.
Given that we seem to have granted the deal in exchange for assistance in the War On Drugs, there would be point (at least, in the minds of those who support said policy, which does seem to be those with power) even if the trade deal itself were of benefit only to Ecuador.
