@protoaddct But we shouldn't do it if we're talking B&R policy, since a card being similar with another in the B&R list means nothing.
But it 100% does and always has. It does not mean that similar cards are snap restricted, but it is a contributing factor to be weighed. There are also a number of cards that are argably not restricted because of the presence of other cards on the restricted list.
Every time a moxen comes out we absolutley hold it up against the other moxen. We then evaluate it based on them and its interactions with them. Not every mox enables the same strategy or can be used in thr same place. If opal were to ever get restricted you can be assured it will be because of its interaction with other moxen on the list and they would be cited as precident.
Likewise LED and Petal were not exaclty the same as lotus, but it was certianly a basis for comparison. Treasure Cruise was not ancestral, but people called it ancestral 2-5. Sphere of resistance and Thorn are not the same, and different decks may actually want one and not the other. One is restricted, one is not. We were able to make that descision yet still compared the 2. Holding thoes 2 up against each other is perfectly fine, and holding them up against trinisphere and now D sphere is also just fine.