[Wintermute]

I started playing the old $100 PLO8 game back in Nov/Dec. When the 2/4/6/1000 tables came out, I immediately began playing them all. I wasn't quite sufficiently BR'd, but managed to do fine.
Why do I think the 600/400 are "easier"? Well, I say that based strictly on my results, especially the most recent results. A while back I posted these stats from my first 80k or so hands at 200 and above:

$1000 level: 3.46 BB/100 over 13,111 hands
$600 level: 15.6 BB/100 over 17,585 hands
$400 level: 3.05 BB/100 over 18,891 hands
$200 level: 11.8 BB/100 over 32,524 hands

Over the last 35k or so hands:

$1000 level: 3.67 BB/100 over 5,544 hands
$600 level: 18.28 BB/100 over 9,828 hands
$400 level: 14.95 BB/100 over 9,221 hands
$200 level: 9.19 BB/100 over 10,431 hands

I suspect things are working better for me at 600 (and 400 to a degree now) than at 200 due to a confluence of several factors:

First, the competition: players from higher limit HE games may try PLO8 for kicks, they need to find a game where the threat to their BR makes it at least somewhat interesting ($1000 NLHE player isn't going to sit in a $100 PLO8 game for fun). I definitely see few-time players at these levels that I never see at $200 PLO8. Also, players from lower limit PLO8 move up when they are running bad at 100/200, and hemmorage chips. That happens all the time.

Second, these levels are "lost in the middle"... all the *really* tough players with unlimited BR's are playing 1000 & 2000. On the flipside, the good players who are either not BR'd high enough or are too scared to risk any "serious" money are stuck at 100/200... (I think this is a real factor... 400/600 is where you start to venture into the "I just won/lost a couple month's rent" territory from "I just won/lost a nice meal with the lady", I think this definitely prevents many good players from testing the waters, or from playing as well as they can.)

Third, the 400/600 levels fit my BR/style/comfort-level best. They're high enough limits that I behave myself, but low enough (non-threatening to the BR by a long shot) that I don't become passive or change my style in other ways. I suspect that at 1000 and 2000, I am playing a bit differently (weaker)... the PTO stats are very similar across the levels, but it's easy to change one or two late-street plays from how you usually would that make a huge difference in winrate but don't show up obviously in the routine PTO stats.

Hope this helps, see you at 400/600.