Still Can't figure out the big difference

I continue to play mostly Pot Limit; but I also mix in NL tables when there aren't enough PL tables running. I've also starting mixing in some PL/NL 100 games as I have the bankroll to do so. So, what is the difference?

This weekend, I was positive for PL and negative for NL:

100PL ; 105.73 bb/100 .. OK, I obviously ran well
100NL ; -39.18 bb/100
50PL; 26.01 bb/100
50NL; -3.58 bb/100

I took a look at PokerTableRatings at one point over the weekend and I was:

6th for the week at 50PL
13th for the month at 50PL
13th for the year at 50PL

These lists include all games such as Heads-up and Short handed so it is really hard to really compare how I am doing against people playing at my games.

Here is one reason that I like PL:

http://www.holdemmanager.net
NL Holdem $0.50(BB) Replayer Game#12952819221

grouchoM ($69.90)
Danboi8 ($93.05)
sexycomadina69 ($139)
wphwpi ($50.50)
willwonka ($64.15)
kewer111 ($53.90)
FernandoFreitas ($25)
SchruteFarms ($50)

grouchoM posts (SB) $0.25
Danboi8 posts (BB) $0.50

Dealt to willwonka 3c 3s
sexycomadina69 raises to $1.75
fold,
willwonka calls $1.75
kewer111 calls $1.75
fold, fold, fold, fold,

FLOP ($6) 8s 3d 5c
check,
willwonka bets $3
kewer111 calls $3
sexycomadina69 folds

TURN ($12) 8s 3d 5c 8d
willwonka bets $6
kewer111 raises to $12
willwonka raises to $18
kewer111 raises to $24
willwonka raises to $30
kewer111 raises to $49.15 (AI)
willwonka calls $19.15

RIVER ($110) 8s 3d 5c 8d 2h

willwonka shows 3c 3s
(Flop 98.4%, Turn 100.0%)

kewer111 shows As Td
(Flop 1.6%, Turn 0.0%)

willwonka wins $107

Oh well, I guess it isn't important. I'll just keep doing what I'm doing for now.

Have a nice day!!!