Hmmmm, interesting....
Well, I will say that upon closer inspection, they do apear to be different sails. At least the zipper is a different make, and there are telltails and windows on the Hobie jib, which is really important to me.
I am still glad I was able to purchase the Hobie branded jib, and even happier that it is different than the "generic" one.
Thanks for your time and your quick answers, Matt.
By the way, I just LOVE my Hobie 18!