Keep them both and definitely DO NOT sell that Benge. It's an earlier LA Benge and is probably going to be a great playing trumpet.
The Bach is going to have its place too. If you can manage, even if you don't play professionally or gig that much, keep them both.
That's my advice.
On second thought, that Benge is pretty much worthless. I'll give you $100 for it, out of the "kindness" of my heart.
Just kidding. Keep them both if you can, but definitely the Benge.