No, why would a company that prides itself in their attention to detail accept non matching options? After all, Sir Jony himself declared, "Apple Watch is the most personal product Apple has ever made". And this is not a small company. Not only do they have and make a ton of money, they are also the best at logistics. No need to limit and defend their ability to churn out multiple SKUs seen through your lens. If they could make the iPod touch in multiple colours with matching wrist loops, at a presumably smaller scale, you'd think they are more than capable of supporting their customers choosing different case colours. Even if they limited it to a subset - white or off-white, black and (PRODUCT)RED.