In my experience the Adox Adonal is exactly the same as the recently available Rodinal. Foma R09 seems to be from the same factory but perhaps slightly more diluted. It is definitely not as strong as the Rodinal/Adonal. I notice on the bottle they suggest diluting it 1:40 whereas the Rodinal suggestion would be 1:50. If you can account for that difference then you should get comparable results.