Couldn't tell you the definite answer to this but I currently work in a actuarial team (for a large corporate) and the head for our whole department got his Actuarial degree from Heriot Watt University. He has had a very very successful career from his education from here.
From my experience personality and leadership traits will become much more important than your degree if you wish to go far up the corporate ladder.
Sorry if this wasn't of any use but I am sure you will do well coming from either of these universities. Just choose the one you think you will enjoy the most.
If you do well academically, have ambition and confidence the success will come.