Sent the redline in for service & STI driver for upgrade at the same time and just got them back. My STi was early 06 model with the same LNAs as my redline. I did a little trip today and tested both units, both were same height on windshield 8 inches apart. Results surprised me a little;
On the many X band alerts I had the STi alerted first every time, sometimes it was by just 1-2 sec and several by 6-10 and a couple the redline didn't alert at all.
On K band they were equal, they were so close to going off at the same time, but I was keeping track of which one actually went off first, 3 ties, redline 4, Sti 6. I call that a draw.
On Ka the STi alerted first every time, ran into I/O twice, first time just cresting a hill got a short alert from Sti, nothing on redline, 20 sec later got another alert from Sti then the redline alerted. This happened all the way to the Leo. Later was 1/4 mile behind Leo traveling same way using I/O, Sti alerted first every time. The one C/O I had the Sti alerted a good 10 sec before Redline. I also had 2 short ka alerts with sti and nothing with redline.
I will continue with the test and see if this trend holds up or if my redline was just having a bad day.
Both were set up same, Pop off, TSR off, Highway mode.