For £20k you get a lot of muscle and although its kind of chunky, the car looks really nice. The interior also looks very nice!
Are blind people allowed to drive?!

I don't know what cars you've had previously that you're saying the interior of a Focus is nice, but they clearly weren't up to much. The Focus is renowned through most magazine reviews to have a terrible interior and a dreadful driving position!
You've posted on a GTI forum, so the likelyhood is that 99.9% of the people here will tell you the Focus is cr@p and the GTI is the best.
The best way is to decide for yourself and see if you can take them both out for a test drive... preferably on the same day.
The old saying is 'you get what you pay for' - and thats the case here too.