BCFT run a Jetline course that takes you from zero to f(ATPL) using, for lack of a better discription, 'a sequential modular programme'. i.e it is Modular !
OAA is an Integrated Course
The immediately, in your face, difference is ~£20-25K.
Other differences...WOO... better not go there
suggest you seek out the eternal Modular vs Integrated threads
With regards to employment prospects:
There are lies, damn lies and FTO statistics. 
Good Luck
Fran
