I used to have a 2010 Demo 8, and I've tried a 2013 Glory. I'd say the Glory definitely has the better suspension platform; it pedaled better and the suspension was way more composed in the rough. The Demo did have better pop, but otherwise I liked Maestro much more. In terms of geometry, the Demo was the winner. Low, long and slack, the Demo cornered really well, felt comfortable in the steeps and had a lot of straight line speed stability. The Glory was shorter, higher and steeper which translated to a bike that was more nimble and handled really well, but was a little less confidence inspiring on the steep and/or fast stuff.
Now which bike would I get? I'd say the Glory, because you can tweak the geometry with some headset cups. You can tune your shock to negate the drawbacks of the Demo's FSR suspension, but I think it's a less than ideal scenario. Also, the 2010 Demo is a bit out of date at this point. It has a 135mm rear hub with an offset and the BB is 73mm. Not a huge deal, but a bit inconvenient if you ever want to swap parts with another bike that will most likely have the 150/83 measurements.