Due to its Athlon 64 X2 Dual-Core Processor (1.2 Ghz), it may actually offer more performance for the Buck, whereas the slogan "up to 5 hours of battery life" doesn't really sound that promising...
Anyway, if you're thinking about buying a 751, you should definitely check out the Ferrari One - if three to four hours (let's be realistic...) of battery life is enough for you and if you're ready to go notebook-style at the cash register.