i think i got the model on sale because it is an old model.

i should say that with respect to the rankings online...

people said the 'braun' one was robust (didn't poop out on them)
and had a good motor so (once you get used to it) it removes hair pretty quickly compared to those with smaller motors
about half the people with 'emjoy' said they pooped out when they were just out of warantee (after one year)
they seem comperable really...
i'm not sure that the models are all that different in what they do
it is more the bells and whistles.

for example... i got a starter head (which i used for all of 10 minutes) and a bag to keep it in.
the really expensive one has a light on it to help light up the hairs (i'm not convinced). i think it also comes with a smaller attachment for face and a different smaller attachment for bikini and pits.

basically... looks like they are fairly much comperable...
i picked it up for AUS$79. i noticed the site said it was about 50 pounds though so looks like (with the exchange rate) i got quite a saving.

maybe check out the braun models that are available...