There is a pretty steep price/quality curve (i.e. each additional 50-75 pounds gets you tangibly better quality) until you hit about 700-800 pounds, at which the curve tapers off, and the price "steps" become greater (100-200 quid per noteworthy increase in quality).
Sales often allow one to obtain a bike from 1-2 quality/price brackets higher, and I see the Norco as such a price/quality combination, bringing what looks to be the best value in the lot IMO.

The Revolution looks like a reasonable bike, to be sure, but is easily one full step down in quality in all areas. For example, the derailleurs (Acera, 2300) are near the bottom of Shimano's line and are 8-speed, whereas the Norco is equipped with the full Sora mid-level group in 9 speed format. Another example is the the spokes on the Revolution are listed as "steel" (not stainless), which tend to get dull and corrode over time, whereas the Norco has Stainless steel spokes. Both bikes have their fair share of in-house (non-branded) parts - handlebars, seatpost, stem - which is not uncommon at this price point.

Anyway, just a few thoughts.

As an option, here's one of similar quality to the Revolution cx that has slightly better spec, and includes mudguards and a rack.