I like to play 9/10 person tables a lot, but when it comes down to it, I'll play both. What I like about the full tables is that you can pick up more chips by just playing tight starting off because of the donks just paying you off constantly. Then once they start to get knocked out, you have a nice stack to work with and start to pick up the pace from there. So when it comes down to 6 people, you already have a nice chip lead and have a better chance at placing since it's top 3 and not only 2 spots.
Seems like when ever I play short handed sng's, they are always more of a grind out then the full tables.