Is this a Fischers or a Masked?

[Willow and Oscar]

Hi everyone, well I've definitely got the 'lovebird bug' and have decided to get one more (just one as otherwise my living room will look more like an aviary haha!) I'm hoping to get a black masked. I found this picture while looking into it and this bird is described as a Fischers, but to be honest I would of thought it was a masked if I hadn't of read otherwise. Just wondering how can you tell the difference?

http://pets.oodle.co.uk/view/hand-reared-and-tame-blue-fischer-baby-lovebird/2622925288-london-lnd-en/

http://pets.oodle.co.uk/view/hand-reared-and-tame-blue-fischer-baby-lovebird/2622925288-london-lnd-en/