'72 C/10 Suburban Doors

[jaywashburn]

Hey guys/gals. New member to the forum & my first question pertains to doors. Iam in the middle of restoring my burb & iam finding that my driver & passenger doors will likely need replacement. I will initially look for good used ones first due to budget constraints. I have heard that the '71 Suburban doors are a little different than the '72's therefore rendering them a useless swap out. Is this true ? In various photos I have seen of the two years they appear identical.
Much thanks for any input.