I just traded in the v10 for the s7 edge. I'll miss the 64gb internal storage, the build quality (the v10 is a tank) and the swappable batteries, although by two battery charging kits were only accounting for the v10's horribly horrible battery life.
The s7 edge's screen blows the v10 out of the water, hands down. The fingerprint scanner is much nicer, as is the external speaker. I went from a little over 3hrs SOT with the v10 to around 5.5 with the edge, so that's a massive improvement.
Honestly, unless you're doing much gaming you won't notice much difference in the speed of the phones. The v10 UI was every bit as fast as the s7, which is to say you'll be happy with either one.
Overall, I'm happy enough with the edge so far. Still not a fan of having an all glass phone with no removable battery, but my options are limited here lol. I'll check out the g5 when it's available to see if I want to hang onto the edge.