Capacity
Apple has never made a big deal of the storage capacities of the Apple Watch, and although many users may not care, the amount of memory can have a bearing on things like the number of photos or the amount of music you can store — something that’s important if you’re not using a cellular-capable model, or simply don’t want to use a lot of data.
The Apple Watch Series 5 actually gets a quiet bump to 32 GB of storage in both the cellular and non-cellular models. This is double the capacity of the Series 4 and cellular Series 3, all of which only came with 16 GB, and actually 4X the capacity of the GPS-only Series 3.