To be sure, I am not discounting those other review(ers), as they are just snapshots in time (over a one or two day period). Long-term experience "testing" tends to bear out nuances in behavior that those other venues simply don't or can't examine.
With respect to your decision--I have attempted on many occasions to point out that there is more to a detector than merely sensitivity (ie; long-range detection ability).
A primary one, is quickness to respond (ie; alert).
While the Redline is unquestionably somewhat more sensitive than the V1, it is also somewhat slower to alert (intentionally and by design) to brief radar signals (either from brief reflections or brief instant-on usage), particularly Ka-band. This is relative to the V1, which is considerably quicker to respond/alert to certain bands and sometimes a quicker detector will outperform (ie; out alert or provide more advanced warning time) a detector that arguably is more sensitive.
This is true for the V1 and certain higher-end models from Whistler. Both companies produce very quick to respond radar detectors, something that I really appreciate personally.
The upshot of the V1's quicker response times, is better/advanced notification to approaching IO threats. The downside, is a higher potential level of "falsing."
Escort (and Beltronics) take a slightly different approach. While they do, indeed, provide high (or very high) levels of sensitivity, they also strive to be quiet(er) either to other cheaply-built/poorly designed radar detectors (ie; early Cobras, etc.) or around town.
The Redline has certainly demonstrated to me improved laser sensitivity (relative to older STi Drivers), but the V1 is still the reigning champion.
Either model, will certainly provide years of protection.
In a way, I like to think of it as comparing a Rolls to a Bentley.
They're both that good.
BTW, here are some related blog postings on this very topic: