Not what OP was asking about, but related: I have E6 films scanned (Nikon) then digital file printed out by WHCC onto (either Kodak Endura or Fuji Crystal Archive?) RA4 paper that approaches Ilfochromes in surface look. I imagine drum scans even better.
Sadly almost gone now, Ilfochromes were and incredibly beautiful material.
Sadly, cross processing RA4 materials is a difficult way to go. It can work, but you have to select the scene and fiddle with the process. Busy scenes and landscapes work well. Portraits do not.
I have sadly ended up with a mixed work flow for my slides. Scan and print.