It is. There’s a feature table in the manual and it’s one of the glaring differences between the two. I never even thought to look into the details that closely, and even if it doesn’t have the hardware to flip the paper around and scan the back, it should be a simple software feature to add.
For some big stacks I’ve just got the pair doc_front.pdf and doc_back.pdf and I was thinking about making my own stupid script to interleave the two docs into one.