Compare winrates of NL to limit, which can I make more $ multi-tabling

Lets compare winrates for NL and limit.

I went to the NL forum at 2+2 to see what a good winrate is for NL...looks like 8ptbb/100 is a good rate (according to the FAQ stciky). so you would need a $1000 bankroll to play .25-.50 NL. 8ptbb/100 would = $4

Compare that to 2-4 limit where you wold need a $1200 bankroll. a good winrate is 2bb/100.
That would = $8 per 100 hands.

So clearly there is way more $$$ in limit than NL.

Are any of my #'s off? how many hands can you play in an hour at a NL table? At a limit table, you will play 70 hands per hr on average.