That's what all the aftermarket gears I've seen look like, but I came across one listing saying their gear was 're-inforced'. The biggest market for these will be Golf sunroofs that won't have the extended opening, I don't always trust EOS compatibility claims by sellers or Ebay.The replacement gear I have is pure nylon.
Look further into that slot in the control pcb that sits over the gearbox. Unless you know what and how to look for it, you would never know if there was embedded steel or a small magnet (s) which they use for tacho (revolution) counting. Even the composition of the nylon may be different (embedded metal) allowing them to count the moving gear teeth with a Hall sensor. Obviously a replacement gear then has to have exactly the same diameter and teeth count. I've come across this on gearbox speedo pickup gears and similar on front wheel bearings for ABS pickup. If you still have the old damaged gear you can try scanning it with a small compass and magnet looking for any attraction?