s44 is pretty anti-Surface to begin with, but in general, SP2 is heavier, but not really by that much. iPad 10" (4th gen) was 1.5 lbs, Surface Pro 2 is 2 lbs, and still way lighter than most Ultrabook in that category. You simply don't really equate Surface Pro 2 with gimped tablets, since it's a computer.
As for Surface 2 -- if you think you can do everything you need to accomplish with it (and don't need any Desktop apps), I think it'd be a better option if you need any semblance of productivity, than most tablets out there, considering you can Plug and Play most things out there (such as Printers, scanners, monitors, mouse, etc)