Apple watch series 3 and 4 comparison July 8, 2019 16 32 64 128 Apple watch series 3 4 5 comparison Apple watch series 3 4 5 6 comparison Apple watch 3 series 38mm vs 42mm Apple watch series 3 vs se 2020 Iwatch 3 vs 4 vs 5 Series 3 apple watch 44mm Iwatch 3 vs 4