Calling a fenix a smart watch is a stretch anyway. I've heard a lot of good about the Suunto lineup, but at the $500 - $800 we pay for these things, I tend to stick with the more familiar name. It's kind of like hanging onto the edge of the pool
Also, I started in 2015 with the original fenix, so until they botch it, I will probably stick with what I know.
One more thing - I did a week long test drive on a fenix 6, finding no reason to upgrade from the previous model. There are some upgrades in bells & whistles, but nothing for my purposes.