DW,
regardless of where you train you will get the same licences. What is more important is that you feel comfortable in the environment in which you will spend 13 to 15 months on a very demanding course.
That is very much a matter personal to you so before shelling out vast sums of money, I would suggest you visit them.
I had a look round Bae when they were based at Prestwick, Cabair when going for one scholarship, and OAT for another. They all have different styles and setups. Without completing all three courses, you will never get a valid direct comparison relevant to your needs. Your impressions and feedback from ex-students will give you the best guidance.
Personally, I thought Bae were excellent, but I don't know what their Jerez setup is like.
Good luck,
Obs cop