Since this is a training set, and I assume you're after longevity, I'd recommend the Williams. Although I hear good things about Easton wheels, longevity isn't always one of those things, and since they build most of their wheels with very high tension, it's tougher to replace a spoke or retrue those wheels. I believe the Williams are handbuilt and use traditional J-band spokes, so they are unlikely to go out of true or break a spoke, but easy to fix if they do.