I definitely think there is a difference in the GPS quality between the generation of chipsets used. My older Apple Watch (3, non-cell) had worse GPS than my ne

I definitely think there is a difference in the GPS quality between the generation of chipsets used. My older Apple Watch (3, non-cell) had worse GPS than my newer (5 cell). I didn’t really notice the difference and accepted the low GPS quality from my phone until I got the newer watch with the cellular chip. Then I could go for runs with music and GPS without my phone. The difference was amazing. The newer generations of watch are much better. And cellular was better then GPS only, ironically. YMMV - I think a lot depends on where you are and the towers that are nearby. That said — I’ve also considered just flipping to a Garmin watch. The battery life in my Apple watch isn’t enough to get me through a marathon, tracking GPS while also listening to music (I’m not fast, so ~ 4 hours).