Win 7 vs Win 8 for mobile?

[dsc106]

I have an extra serial of Win 7 Pro. Is there any advantage to going Windows 8.1 for mobile in terms of battery life or performance? Windows will be running via bootcamp on a new haswell based Macbook pro Retina w/Mavericks. Not sure if Win 8 will be improve my battery life at all?

 

[glugglug]

I would say battery life is the single biggest improvement in Windows 8. It doesn't do anything for desktop, but for mobile, I'd go with Win 8 for that reason specifically.

 

[dsc106]

OK, I thought that might be the case. Thank you!

Where is the best deal I can get on Win8 Pro, by the way?