Spruce, I break it down a little different, First 4 (SPD/REB/LP/PER) and Second 5 (ATH/DEF/BH/PASS/ST) and than take WE into consideration. Let's do a full breakdown for Johnson (SPD -25/REB +6/LP -1/PER +7) for a -13 in First Tier, but in Second Tier (ATH -19/DEF +5/BH +15/PASS +23/ST +5) for a +29, and if you add in the +28 in WE, you get a composite score of +44 for Johnson. To break it down another way, (ATH/SP -44), (LP -1) (REB/DEF/PER/BH/PASS/WE/ST +89). If Johnson was equal in ATH & SP, he'd have a rating of 502 compared to Walker's 435.
Of the 7 catergories I mentioned in my first post, his REB is slightly better but enough to matter because it's a CORE catergory, DEF is negligible (they both suck), PER is better and enough to matter (CORE Catergory), BH/PASS/WE are all "far superior" as Walker's BH & WE completetly suck, and ST is slightly better, but is basically negligible.
Personally, neither one of them would have made my radar, let alone me recruiting either one of them. Johnson because of your side of the argument (ATH/SD) and Walker because of my side of the arguement. But I still think Johnson is the better SF, if I had to pick one of them.