Just for fun I tried turning on the V1 and the STi at the same time. They seemed to play together very well. I noticed the alert times were about the same. Sometimes the STi would alert first, other times the V1, so as far as I can tell these 2 RD's are VERY, VERY close in performance.
The filtering on the STi in city mode seemed to be a bit better than the V1's L mode. My question is, do you think the RD's are interfering with each other?