Differences throttle flap W140 Pin Occupancy

Hello, with my w140 Bj 94 5.0 litr V8 is a throttle flap with round, not angled plug installed. Now I have seen that the same year of construction have partly round, angled plugs, which are not compatible with each other. Where is the difference? the number of pins is the same. does someone have a calendar? I am grateful for any information!