dont quote me on this, but im pretty sure Deloitte pay slightly more than that, probably somewhere between 26,500 and 27k.
I know with deloitte that you get a laptop and a phone, i assume that you would get the same with PwC, and to be honest there isn't going to be much in the benefits/perks between the two of them.
I know that Deloitte offered graduates last year a £7k interest free loan which you then paid off over your first 3 years in order to get you started, not sure about PwC, and Deloitte will give you an interest free season ticket loan if you have to travel into work, again i assume PwC may do the same.
One difference between the two is that Deloitte have larger Consulting and Corporate Finance divisions so if you wanted to move into them later then I guess you may be better there, but on the flip side, i think PwC have a larger audit team.
To be honest, they're both good places to work, the clients will be similar at each.
Go with where you want to most, money, prospects etc will all be pretty much the same.