But first I had better say which ones I have seen.
Emma (1996) - the film with Gwyneth Paltrow
Emma (1996) - the TV adaption with Kate Beckinsale
Don't get me wrong, both of these are good in their own way - which is saying a lot when you consider that I don't even like the story ;)
My favourite of the two though is the TV adaption because it actually does the impossible and helps me tolerate Emma. It doesn't make me like the story anymore but I can watch it without wanting to
The film version I find to be a little too quirky - does that make sense (it does in my head). It feels a bit too...modern and it doesn't quite it well with me.