e30 vs e34 medium case diff output flange

[mr.vang]

I have searched with no result. Are the diff output flange the same? Are they compatible with each other?

[roguetoaster]

The P/Ns say yes, at least M20 to M20 models:

http://bmwfans.info/parts-catalog/E30-2-doors/Europe/325i-M20/browse/rear_axle/drive_flange_suspension_gasket/

http://bmwfans.info/parts-catalog/E34-Sedan/Europe/525i-M20/browse/rear_axle/drive_flange_suspension_gasket/

However, 535s and up:

http://bmwfans.info/parts-catalog/E34-Sedan/Europe/535i-M30/browse/rear_axle/drive_flange_suspension_gasket/