In reply to joshfinz:
In my opinion, neither.
Both of those places you mentioned dont have any routes longer than 20m, and even the highest indoor climbing wall in the uk is less than 25m.
The vast majority of routes in the entire of the UK only require a 50m rope.
It will save you some money, and as it will be your only rope it will take wear being used all the time, so when it comes to it it will be cheaper to replace.
So my advice is save some money and go with a 50m rope at most.
Brandwise both of those ropes are pretty much equivalent, so pretty much just get the colour you like best.