I speculate, “Pro” can be a version with the following possibilities:
– LTE/Verizon connectivity (I hope not !!!)
– Titanium (other material)
or
– Dual frequency GNSS (I hope so !!!)

I’m raising an eyebrow at solar charging. I can imagine it keeping the watch ticking over in standby for longer, but it’s hard to see it doing much to improve battery life with GPS on, which would chew battery much faster than the cells could put it back. Not sure where you’d put the cells, either – between the main bezel and the display as a ring, perhaps?
6 variants seems an awful lot, too, though the range does sell very well; perhaps the difference is something like LTE and/or the ceramic bezel off the Marq watches.

If Garmin have gone to the trouble of silencing it, though, there is probably something in it!

I wonder how successful was M600 for Polar (and if there will be any successor).
Sadly, I agree with you that Garmin may not be willing to bet on Wear OS for Vivoactive.
Still I consider that there is sizable number of people who do prefer Garmin HW and Garmin Connect platform (versus what Google provides) but who think that what Garmin provides for smartwatch “part” of the platform is very rudimentary.
Even though I’m long time committed Garmin user, including almost entire Fenix line starting F3 – I’m strongly considering moving towards some newest Wear OS watches, e.g. Fossil Gen 5. This will be trade off for suer- I will loose some fitness/sports capabilities, but the gains on “smart” side of watch will be solid. Garmin is giving very little attention to “smart” side – not even willing to enable slightly bigger fonts for people with decreasing eyesight. Sigh.

Just noticed this. I was quite concerned about the legal implications when I saw things were getting taken down. From what I can gather, once it is in the public domain it is fair game. Which is the foundation of a lot of journalism.

That being said, I am not going to mess with the Garmin legal team, so if they did contact me, I would obey.

@ConspiracyTheorist: unless Garmin is a complete mess – I rather suppose it was controlled leak. IMHO – such “leak” are quite beneficial for companies:
* build hype for upcoming product – basically free-of-charge advertising
* makes people who are on the market for new watch to wait with purchase decision (assuming they are considering buying from competition)
* provides early feedback on external design choices – possibly enabling some last-minute changes to product look&feel.