I think both the 3 and the 4 will be a step up from my GW4... I could.get the 3 and the buds pro 2 for the same price as the 4I have the 3. Came from the 1.
Much improved battery life and speed. Charges much faster and screen is brighter. Until there's a big improvement which I can't see in the 4 I'll sit tight.