In a RG : best way to reference to current cell thing's data?

Hi,
Is any of these 2 ways of refering to a RG’s current thing’s data prefered? If yes, for what reason?

Every group inherit the thing from its parent : “parent thing”

OR :

From any place inside the rg, you refer to “rg’s List of things:item# current cell index”

One is longer to write and read, but the other makes it mandatory to attribute things to (many) groups for no real reason


Thanks all