if you are classed as a couple for ftb purposes it wont make any difference who claims and you will get the same no matter which namre it's in. is better not to change who claims due to the pita mess at tax time nwith reco, some supplements to one ptr some to the other. if your estimates were out at ant point you may get a debt for one, credit for the other etc

i havent been at work since it changed to include same sex couples but i believe it was to be set up so either ptr could claim pp but not both kwim?