There are some videos that do this comparison in a mostly non-scientific manner if you'd be interested to see the performance differences of a snapdragon 4100 to a 2100/3100 [1]. There's even a few videos compare Apples to Mobvois [2]. Again, fairly non-scientific. Was interesting to note that in video [2], the reviewer even goes into depth on how the TW3PG (phew) performs while connected to an iOS device (spoiler alert: he doesn't hate it!).
Since I'm a full Google boy, I couldn't entertain the idea of trying an Apple Watch even if I wanted.
I didn't search far and wide, so I'm sure - as with everything - people can cherry pick reviews one way or the other. These were the first two I found that weren't "IT'S YA BOI WATCHMAN666 COMING AT YOU WITH A SPONSORED VIDEO" when looking.
At this point, I'd maybe wait to see what the official Google Wear OS watch will look and act like - purely because it's an OEM watch for Wear OS, "surely destined for greatness" (lol), but feature-for-feature, ounce-for-ounce, and kwhrs-to-kwhrs, the TicWatch Pro 3 GPS has really impressed me. I was waiting around for the Google Pixel Watch or whatever they'd name it, when I was gifted this one.
The only negative experience I had was Google Assistant (yes, on my watch) wouldn't speak out loud with my Pixel 2XL phone's language was set to English (Canada). I had to set it to English (US) for my watch to speak results to me.
It should also upgrade to WearOS 3 "in the second half of 2022" (no citation on this one)
1: https://www.youtube.com/watch?v=_zBICoXBbLg - side-by-side comparison to SD4100 vs SD3100/SD2100
2: https://www.youtube.com/watch?v=XmSarvfv3YY - Feature & Compatibility Comparison, GW3, TW3PG, Apple Watch 6
Best of luck in your travels