E30 Zone

I am thinking of replacing both front doors instead of repairing rust as it is still possible to find decent ones for E34, I was browsing in-net in search of compatibility of E34's doors by year and by model, as far as I understood the doors from all models are the same there is a bit of difference between doors of E34's made before 91 and after 91. So I found a pair and asked about the year and model of the E34 they are off but when checking the RealOEM I found out that id nrs. of those differ from iX, example:
94 530i DOOR FRONT RIGHT 41518138006 DOOR FRONT LEFT 41518138005
94 525iX DOOR FRONT RIGHT 41518138004 DOOR FRONT LEFT 41518138003
It is only one last digit but now I am not sure if they actually the same, any ideas?
Thank you VidMate Mobdro

Have a word with Cotswold on here, they are very helpful.

Mart.

Later e34 doors have an internal reinforcement bar across the centre, and the lower plastic trims are flush with the panel
Whereas early e34 doors have no reinforcement and the lower trim is not flush

There is also a difference with how the handles and lock attach so be careful