Staple
I am not aware of any difference for DEP's with experience, regardless of type-rating held. They may be a difference for NEP's (New Entrant Pilots) who have little experience, but even then I'm not sure.
[By way of explanation, BA sponsored trainees {TEP's} had money deducted for a few years to recoup training costs, which then increased due to a 'misunderstanding' with the IR about tax status - or something].
Do not however, base any decision on my belief, but seek further info from BA / BALPA.