Keep it. You will absolutely adjust visually. I have the Santos Dumont which wears even slimmer and smaller to the eye.
Ultimately it comes down to what gives you wrist satisfaction.
The elegance of the Santos in any of it's forms suits my aesthetic and even when in casual clothes I wear to the office (tech so there's a lot of hoodies and ill fitting chinos). Doesn't stand out as being really out of place.
You'll know within about 4 weeks of wearing it whether it clicks. Worst case sell it on RWI and give it a home to a nice member of the community