Just another point to this subject:
The only outside difference between the two fuel gauge types are the small lettering of the max cap of each tank for the different types i.e
L.TK:2250 R.TK: 2250 and L.TK:2500 R.TK: 2500
Plus, note the similar numbering used that can be confusing even with huge lettering: 2250 2500.
The pilots are looking for the real information bit, remaining fuel kg digits, so this kind of clues are overlooked very VERY easy. Question: Would you have noticed it?
GD&L