Exactly. All relative. Would a #1 casting be better than a #9? I would think the "best" would be a #2 or #3. They've had a chance to fix anything that was wonky with the mold to start off with and not enough runs to need to fix the mold because of wear.
At best, I think picking a certain mold # thinking it would be better than another is a total crapshoot. Sonic test is the only way to know for sure.
