I owned a 790, prior to buying my current 990. A very close friend purchased the 1428v Massey. He has had nothing but problems with his machine. He has driven both, and had used my 790. He told me that he felt that the 790 had it all over the 1428. One of his biggest complaints was with the loader on his 1428v. He also said that JD felt more "rugged" and seemed so in its construction. I'm aware that that is all subjective, but I'll tell you this, his 1428v is sitting, broken, in his yard, while my 790 went on to bigger and better things.
I had tried both machines when I was looking. I liked the "feel" of the JD better. Also, I knew that the resale is better for the JD machines. If you ask someone about a tractor, the first words out of their mouths is, most often, "like a John Deere?!"