If it is convenient for you to visit an Apple Store (or a Best Buy, or other retailer who would have display models for you to try on), then I suggest you do that. You don't say how large your wrist is, which is the most important factor.
My wife tried the larger watch size before we bought our new S6 watches, and she didn't like it on her wrist, which is quite small. But some would enjoy having a larger watch, even with a small wrist. It's going to ultimately be up to what your own personal preference is, and you can best judge that by trying on the different sizes and seeing for yourself.
My wife tried the larger watch size before we bought our new S6 watches, and she didn't like it on her wrist, which is quite small. But some would enjoy having a larger watch, even with a small wrist. It's going to ultimately be up to what your own personal preference is, and you can best judge that by trying on the different sizes and seeing for yourself.