I would say the 8, only because I don't own the 9 but if the only changes was adding 1 More head I think the 9 would work just as good or better. Thank you for your question. If you haven't please subscribe and thank you again.
@@nothingbutproductswithgilq2342 thank you! From what I can tell just looking on Amazon, the 9d opens up 2 at a time for easier cleaning, but with that it looks like it loses a lot of flexibility
Honestly I open each part and hit the back slightly then run 💦 but yeah it's slightly kinda all push in together but love shaving my head covers a lot of space. Enjoy it!