Hmm, I haven't played in a while so I can't remember clearly. But there is difference between 10 to 7/8, but not that much I believe. However, if you do compare it to something like 7 to 4 or under, you can definitely tell. I settled with 5-6 just for the sake of keeping the thing last for more than 3-4 years. To me, FFB is already way better than no FFB so just a bit of it it good enough. Plus, it gets tiring if you play a long time if the FFB is set high. Just remember not to set it to 10 if you're going to do an endurance race. Take it from me, i'm exhausted after the 4 hour Nurb.
BTW, if you're going to take it to your dorm or college apartment, you might not want to set it to 10 as it will see abuse from another people, unless of course you hide it from other people.