Don't waste your time worrying about the difference between 622 vs 559. You're talking about a 10% difference in a quantity that hardly even matters.

If you really have a situation where all other things are equal, then the most significant difference between 622 and 559 will be tire selection/price at your LBS. If there's anything else that isn't equal then it will likely be more much more important.

The color of the paint job is probably more important than a 10% difference in rim diameter.