I had a 1000# Equal-i-zer with my 2004 27' Sunnybrook. When I got my 2008 Eagle 328RLS, I needed a heavier system. I liked the way that the Equal-i-zer controlled sway, but I was not comfortable with the stiffness of the bars when moving to/from the driveway from/to the street. My driveway slope is 12% and the Equal-i-zer bars are very stiff and don't deflect much and I was concerned about the amount of stress put on the A frame. The rear truck suspension would really unload. I always hitched on the ball, pulled onto the street and then hooked up the bars. Reversed that when arriving home.
I got a 1200# Dual Cam system for my Eagle. The bars are significantly less stiff. They deflect more when hitched and loaded and are able to bend more when exiting/entering the driveway. The truck rear unloads much less. I like that part much better.
The Equil-i-zer is easier to set up and does not require holes to be drilled in the trailer frame. I like the Dual Cam better for the driveway situation and ease of loading the spring bars if not able to jack up the tongue high enough. The Equil-i-zer might have a very slightly better control of sway, especially if the Dual Cam is not set up perfectly.
I'm now using the Dual Cam for my new White Hawk 24RKS. I still have the 1200# bars, but might trade for the 800# bars. I need to check the ball weight when fully loaded. It was 530# at the dealer with only battery and full propane, but with perhaps 15 gal of water in the rear fresh water tank. I tow with no water, so I'm guessing that I'll be around 700# on the ball when ready to go.