That's the one. The difference is clearer on the inner cage plate.This one?
https://www.disraeligears.co.uk/site/sram_esp_90sl_2nd_style_long_cage_derailleur.html
The difference is very subtle on the flick of the outer cage bit.
So an offset 10T is the problem, not surprised as 11T was used a few years later I think, all 10T seem to be straight through.