9 vs 18

Iowa has around 250 9-hole courses. The majority of which are rather basic but fun and cheap. I recently was able to visit the in progress Silo Club by Kevin Hargrave. It's a great looking strategic 9er with many options, including teeing grounds with different angles and elevations.

All this to ask. How do you all compare 9 vs 18? I know many are not into rankings but someone asked me once grown in where I think it might rank in state. I didn't really know how to address it and other great 9-holers in the state or even across the country compared to their 18 hole counterparts. I'm inclined to remove hole quantities from the equation at all, but doing something great 18 times seems like it should carry slightly more weight than 9.