Upgrade or download 4.1

The KDE 4.04 runs excellent from a live cd with updates. Will the July 24 release of 4.1 be as a upgrade or best download again and install? KDE is on a 2nd sata drive, xp on 1st drive, no problems. Looks like 4.1 will have improvements. I have learned linx runs best on a 2nd drive, amd 64, 3 gig ram, geforce 256 meg, 7300 pcie.