The different offsets would be on the outlet side. Intakes spacing will all be consistent.

Purchased long ago, I just unboxed my spare 24V set. I have a 12V engine handy that had studs only on the top side of each port. The 24V manifold hangs off the 12V engine perfectly. However, the lower studs will not match. Stud spacing on each port is about 62.5 mm on the 12V compared to 70 mm on the 24V manifold.