If your goal is largest sale value, I'm not sure sending them in as full panels will help you since they weren't originally this size. My guess is that if you sent them both together, in most cases because the Shocker side is trimmed past the dashed line, you would get an AUTHENTIC for the "panel" of 2 cards.
Whereas with the Ruth having its full left and right border, you could get a number grade on just the Ruth if you cut the Shocker card off just to the right of the dashed line. That way you get a number grade (like VG or EX) on the Ruth and your sale value will increase.
Example cut:
Maybe on the ones that have both outside dashed borders, you leave them alone and submit them as a panel, that might be eligible for a number grade together.
On the "set registry" demand side, nobody else has submitted a panel, so there is no requirement for anyone to get it. But then, very few people are chasing the W515-1 set (2 total) or the Babe Ruth Master Set (18 with only 6 above 10%). So I actually see less demand for the panel than Ruth by itself, IMO.