That’s kinda what I thought but I couldn’t find much info. They are on a pretty good sale and it’s tempting. I’ve been looking at them for a while.I believe HV is for high volume. Has to do with the pole shape/design and how much space is inside the tent. I'd compare the dimensions/volume/height of the tents you're comparing. I have the copper spur HV ul2 for backpacking and love it.