I went to Cabair and have had 3 job interviews since then and no one was bothered whether it was Cabair or OATS.
Cabair's name is well known and the interviewers seemed more interested in how you did on the course eg first time passes, grades, flying tests (partials or not etc)and how you progressed on the course - rather than which school it was. My advise would be go for which ever school you feel you would be more comfortable in, and then work every waking hour of the day to give yourself the best chance and confidence at interview.