I travelled down from Atlanta to Fla. panhandle, to my parents house just north of Panama City FL. The trip down was dead radarwise, the trip back was a little more interesting.
V1 had POP on, KA Guard ON and the Sti-R had seqments 2,5,8 ON, RDR ON. The V1 was mounted next to the rear view mirror on the drivers side, the Sti-R was in the grill a couple of inches above the top of the bumper on the Ford Edge. This is about 24 inches above the road.
Coming back north:
K-band encounter coming into the small town of Cottondale Fl. The V1 alerted 3 or 4 seconds before the Sti-R to a city cop facing toward me. It's one of the few times that the V1 has alerted before the Bel. I got the alert about a mile out, so there was plenty of warning from both detetors. Not a true save, I was slowing down anyway. I know better to speed through town, the psl is only 35mph and there's almost always a cop running k-band there.
K band speed signs - 431 north of Eufala Alabama. 431 is a two lane road at this point, with a lot of small but steep hills. The STi-R alerted 2 to 3 seconds ahead of the V1 on each of three speed signs, before the top of the hills.
What was impressive was that two of the speed signs were facing away, and even with the STi-R antenna mounted in the grill, a lot lower than the V1, the Sti-R still beat the V1. This isn't to say the V1 did badly, it also alerted before the top of the hills. Since there's nothing but thick woods on either side of the road, I was impressed with both detectors, but a little more by the Sti-R.
BTW, we had my wife's 9500ix in the car the last time we went through here about two months ago, and both did better than the 9500ix in these over-the-hill situations with the speed signs (we were only running the 9500ix at the time btw).
Ka band - Hwy 431 in Alabama, heading north. I was north of Eufala actually closer to Phenix City than Eufala. 431 is like an interstate at that point, 4 lanes, wide median, not many crossroads, but the PSL is 65mph, not 70mph, something that's easy to forget. I didn't have any traffic in front, so I was only running about 73mph.
The Sti-R went off about 4 to 5 seconds before the V1. There's a lot of rolling countryside in the area, and it was 10 to 15 seconds before I could spot the state patrol car coming in the other direction He popped up about a 1/2 mile away. Total distance was about a mile.
I didn't notice the frequency on the STi-R due to the hijinks of pickup truck I had just passed when I got the first alert. He ran up behind me, swerved to pass, slammed on brakes when he got beside me and then swerved back on my bumper. I was keeping an eye on him, and trying to spot the cop at the same time,.
All in all though, it was a pretty pretty impressive performance by both detectors given the hilly terrain and the fact it was Ka band. Both detectors never lost the signal once they alerted. I got a nice steady alert, with both ramping up slowly. I give both detectors an A+ on this one (or maybe an A+ to the V1 and an A++ to the Sti-R).
Ka 35.5 - Interstate 185 in Georgia, north of Phenix City/Columbus. The V1 and the Sti-R alerted within a couple of seconds of each other, and I don't remember which one went off first, although it likely was the Sti-R. They didn't ramp up very fast but both kept chirping away slowly.
It was about a 1/2 mile later that I spotted a GA state patrol car in the median, facing away, shooting oncoming traffic in the opposite lanes. The median dipped down at that point, and he was actually below the surface of the norhbound lanes I was driving in, so a very tough test IMO. Another impressive performance by both detectors.
From the limited time I've run both, it's pretty clear the STi-R is more sensitive than the V1 on both K-band and Ka, but not by a big margin. Where there was actual police activity, they both alerted well in advance of the threat.
I've had excellent performance on KA band from the V1, both on this trip, and a 350 mile trip over to Charleston SC about a month ago (before I got the STi-R). The V1 has picked up KA band in very difficult situations on both trips, and well before I got to the sources. I don't doubt the Redline and Sti-R are more sensitive than the V1, but for the money the V1 is hard to beat.