Omaha 8 Potlimit vs. Limit

being relatively new to competitive Omaha 8, I'd like to know if the same benefit exists for playing no-limit vs. limit as their is in Holdem. Namely, less variance for good players, being able to price draws out of pots, and generally making it more expensive for loose players to chase and/or play weaker hands.

As a top Omaha 8 pro who plays primarily limit omaha8 said "no decent starting omaha 8 hand is that much better than any other 4 cards" he went on to say "the nature of your holdings changes so drastically from street to street" and finally "you always have to be aware of getting quartered for the low" Therefore unless you have a monster for both, it usually doesn't pay to raise a lot.

All that being said, is there anything definitive on the subject of NL/PL vs. limit - which has less variance and which is better for solid players to play.

Also, when playing vs. a total maniac in PL who's always raising the pot how do you approach that?

Also, what are the best resources other than this forum for learning Omaha 8.

Thanks,
Lou