In total agreement with Blacksheep's description of EASA's level playing field - it is now almost recommended to get a european Techies Licence as they dont have to go through the UK's hoops.
At one point I witnessed a dutch airline being told that the former NLA didn't want to start a list of partly qualified engineers and would instead issue full licences.
In UK you paid huge costs, took exams and argue'd to get a full licence, while in Holland you had to argue for a partial licence to be thrown at you! (Mind that the UK-CAA is the only self-funded Governmental Authority)
Also agreed - there is no best. Just those who become most familiar with either side.
Due to the "care" of the MOD to all its troops a few years ago - in failing to do what is being asked here - Military techies dont get any real help with the conversion and even if they manage to cross the bridge they still have to log 1 year of civil registered aircraft work before they get a Licence.
For more questions go to:
service leavers advice group
(MOD'S - Sorry about the advert but this fits here).