Hello b-lilja. I have tried them all except for the terra. As you specifically asked about the Vortex, I will relate my experience with that model. A few years ago I was in a situation somewhat similar to yours. I had compacts and I had midsizeds, but I was wondering if there was something available in-between that would strike a good compromise between these two categories. First I tried the Pentax 9x28. I liked the build quality and the optics were generally nice for the price, but I felt that I wasn't getting the detail I expected at 9x. So next I tried the Vortex 8x32 Viper. I was surprised to find that despite difference in magnification and armor, these two seemed to be built with the same chassis. Nevertheless, the Viper did seem to provide a bit more pop despite the slightly lower magnification. What I didn't like about it was that it cost $320 yet didn't have as nice optics as some $200 8x32s like the Theron Wapiti or Vixen Foresta DCF. But it was more compact and that was the compromise. Anyhow, this was before various companies started introducing some nice compact 8x32s such as the Leupold Mojave HD, the Nikon M7, Zeiss Terra, Maven, Kite, etc. So, if I had to go through the same debate today, I likely would have ended up with something other than the Viper.
You say that you're looking for something more compact than your 8x32 Conquest HD, with the Bushnell 7x26 being a baseline for an acceptable size. So, how much smaller a binocular do you want? Would you need to go all the way to a compact? If so, the Swaro CL would come closest to the Conquest HD's optics. If not, and bearing in mind that the 8x32 Conquest HD is on the large size for an 8x32, would you be interested in a somewhat smaller/lighter 8x32? If so, you could consider any of the compact 8x32s mentioned above. I'd also recommend for your consideration the 8x32 Meostar, which is noticeably more compact than the Conquest HD yet still has very, very nice optics.
Merry Christmas to all!