IBM organises a formal for all ECS students at Southampton, and Southampton only, because of the quality of the course. 30% of all CCL graduate employees have to be hired from Southampton (that's higher than Cambridge). I haven't looked into Bath much, maybe Southampton is better on the hardware side and low-level programming, where-as Bath may be better for high-level programming.
You can't let the statistics speak for themselves because Southampton has a bigger department (meaning more students) than Bath, employers tend not to hire multiple graduates from the same university in one go.
And don't be ridiculous, no university is
that theoretical. CS graduates from Cambridge are at the top of the spectrum for a reason. Take Eben Upton, for example (I work with him). Most of the witty senior software engineers here at Broadcom are from Cambridge, Imperial and Southampton. I haven't met anyone from Bath yet, which suggests they may be better at databases and web-design. Bath doesn't come out with the best compilers, or video codec software engineers, generally speaking.
Don't you think you're being a little biased because you go to Bath? Bath is a great university, I'd prefer it over Southampton generally, because it is a better university as a whole.
But yes, overall, Bath CS graduates seem to be getting higher employability scores (by 6% not 15)
http://www.theguardian.com/education/table/2013/jun/04/university-guide-computer-sciences-itI am doing Electronic Engineering though, so different story.