I just went and read the specs for both) with the surge protection (which is really what you're after most) and the noise suppression (equally important) I really think the additional features of the higher priced unit are more 'fluff' than "substance"
unless you live way out the country where voltage fluctuations may be more common, most urbanized areas are pretty stable otherwise the utility company would be getting constant complaints
here, the power "specs" are + or - 10%, so our 120VAC can be anywhere between 108 and 132 VAC... though it's usually pretty close to 120
the only advantage to the individual banks is if a piece of gear fails to ground it would only take down a smaller group of gear... but you still'd have to stop and investigate/fix/ or find a work around
and, yes I've been known to be cheap ... sometimes
