I'm not gonna add anything new to this, just gonna say that Languages Nutter may have nutter in their name but is spot on. The college system doesn't have easier or harder ones really, the numbers game doesn't work because if you go for a less 'popular' college they're far less likely to chuck you in the pool whilst if you go for a supposedly more competitive one if you're not quite good enough to get in the pool will work in your favour.
However you may decide that the different college requirements (some may ask you for different things at interview, some may request different qualifications etc. etc.) might work in your favour if you go for certain ones, but don't pick just on those make sure you do genuinely like your choice's location and feel and look.