wow, you wear the exact same sizes i do in all of the examples you listed (Jordans 10.5), Lebron (11), Kobe (11, could do 11.5), AM 1 and 90 (11) and Foam's (11).
I also wear FK Chukka's in an 11 (.5 size up from Jordan's, which i consider my true size). But when it came to the Free's, I purchased 10.5 (which fit well), but ended up returning because I thought there was no "bounce." The SP's were the only FK i purchased as a 10.5, and to be honest, you could go a full size down with those from the regular lunar's.
Again, I think the difference between lunars (my fav) to frees are night and day. Lunars have ruined me when it comes to frees.