go where it 's cheaper, at the end, the license is just a piece of paper...
Quality pilot in the making, I think not.
Both schools have excellent reputations but its been quite some time since I was involved directly with the flight training industry. Both schools were always known for having waiting lists so maybe the only thing that will make the decision will be who can fit you in when it suits you.
I believe Bristol aviation has only changed its name and is still owned by MB, although I could be wrong, as I said I'm out of touch.