Well, i do MEng CompSci, so I'll answer these as best i can.
1. The degree courses, the option modules, the compulsory modules, they're all the same from year 1-4. I expect a difference starts to show in year 3, but the modules are all the same. As such, i really don't think either of them will be that different to employers.
2. No. You don't need any programming experience at all.
3. uh. it seems about 80:20, it have said, for men to women, but then that shouldn;t be a surprise, and maybe about 60:40 or 70:30 with international being the smaller number.
4. Career prospects are good - there are a lot of events where you'll get offered graduate schemes which most of the time will just give you a job, and things like that.