Both fox and rs forks work on expanding oil volume in their bladders, not air. They are activated by the air shaft rod but I wouldn't call them air bladders. If the DVO system is totally different then why doesn't it get rave reviews, even online, you don't see people ranting about how good their DVO fork is.
First you said they were the same as a suntour fork just a different coloured leg, to which I said no parts are identical. Then you said they are miles out dated but then you say all current shocks have the same type of air bladders.
They are only a new fork on the market, so I think there will not be that many reviews on them ATM and they are on the heavy side as well. DVO is a different division from Suntour and they can only get better if all goes well.
I also note this Burner is not complaining about DVO after he drops a large some of cash on a bike.
http://www.rotorburn.com/forums/showthread.php?293582-DVO-Tracer
DVO Compression Bladder
On the damper side DVO uses a bladder system. Unlike other forks where the bladder is filled with oil and expands as the fork cycles, the Diamond has air inside the bladder and oil on the outside that compresses the bladder rather than expanding it. This is similar to the DVO Jade rear shock. DVO chose to go this route to combat a few negatives of cartridge bladder systems, including loss of elasticity of the bladder over time. They also claim it improves initial sensitivity. During assembly or maintenance, the bladder is filled with air at atmospheric pressure then sealed to keep oil out. A high pressure dynamic quad lip oil seal helps in this regard. The cartridge is filled with oil using a syringe via the cartridge bleed port at the top of the fork, keeping air and oil separated. As the damper is compressed the bladder exerts pressure on the oil, aiding in cavitation prevention.
http://www.vitalmtb.com/product/guide/Forks,33/DVO/Diamond,15238
