Vivoactive 5 vs 6

So my VA4(s) just died and it looks like I need to replace it. Which is sas cuz I loved it. Was looking at the 6 (currently $299) but the 5 is on sale on Amazon for $190. It seems like the upgrades on the 6 are minimal and my inclination is prob not worth the $100+. Anyone have hands on experience with both? Is there a major difference I'm missing? The extra 4gb of storage and new UI is not a big deal to me. I mainly liked the 4 for tracking walks, runs, pool swims, & cycling. And of course sleep tracking. Appreciate any feedback!