In terms of software, the Watch 5 and the Watch 5 Pro are essentially the same. The main difference is build – the original Watch 5 comes in sizes 40mm to 44m, where as the 5 Pro only comes sized at 45mm. The pro has a sturdier body as well as an improved battery life that can last up to an impressive 80 hours as well as faster charging. Saying that, most people will find the base Galaxy Watch 5 will do exactly what they need without having to pay the Pro price.