Not side by side but I have used them enough to get a feel for what might be an edge. The V-1 false a lot more. It has an edge only on lazer but falls a little short on KA. The K-band they are about equal. Over all like I said I like the V-1 only because of the arrows. Several times it has saved me when a Tropper was sneaking up behind me. One time at night on a rural state highway riding with a bunch of other riders one at least who had another brand than the Valentine he ignored the Tropper sneaking up behind us and my V-1 kept pointing to KA coming in from behind. The other riders blew by me after a couple of miles and it wasn't long here the cop came, flew by me ( running 55) and 5 mi down the highway had the whole sham damn bunch stopped. That was priceless