OK, Comparison photo’s below. The Lower Seat was standard on my Wee (45111-27G00), The Higher Seat was one I bought on the forum, which was advertised as the Touring Seat (45111-06000).
This photo was done on a Tripod, with the seat swapped. The camera was slightly lower than seat level, but there is almost a line of bricks difference in height.
Rather unscientifically placing a spirit level on the seat and against a wall, with a line drawn for each seat, shows a distance on 38mm (So basically the expected 40mm on what wasn’t a super accurate measurement.
View of the two seats side by side (With the back ends aligned to each other). Low Seat to the Front, High Seat to the back.
View of the two seats side by side (With the front ends aligned to each other). Low Seat to the Front, High Seat to the back.
View from the back side of the seats. Low Seat to the Left, High Seat to the Right.
View from the front side of the seats. High Seat to the Left, Low Seat to the Right.
So it seems to me that my Touring Seat is 40mm higher than a standard Wee seat.
As Greywolf points out, the part number we are all quoting is probably more to do with the seat pan than the amount of padding added. I guess each seat needs assessing on a case-by-case basis.
Juv - Will leave it for you to decide how to word the Compendium now.