The ThinkPad is the superior machine. It's a premium brand that's durable, upgradeable, and highly repairable. Ram is cheap. I'd buy the ThinkPad and replace the Ram and still be getting a better deal.
And Windows 8 is nice with Start8 or Classic Start installed. Once you bypass the metro screen you have a really zippy OS.
Is the Ram in this upgradable? I thought it wasn't...