I can’t compare the two. But I got a Duro 15 just over a year ago.
And it’s got to be the most comfortable thing I’ve had on my back. I really like it.
(I went for the largest size - the 15 - as I got it for some trail runs and an Xtri. On some of them I had to carry various mandatory kit as well as food and water - fully taped waterproof jacket and trousers, emergency bivvy bag, spare torch, spare batteries, hat, 1st aid kit gloves, gloves and some other bits and pieces.).
It came with a 2.5 litre bladder + 2x soft flasks.
The only thing against it ? Well to make it reasonably light it doesn’t feel as robust as some of the Camelbaks I have for mountain biking - but at least one of those I have is crashproof Cordura and weighs 4 times this and is no good for running in (I tried running with 2 different mtb Camelbaks first but they weren’t stable when running, so decided to get the Duro).