I have both. They are quite different from each other so I can understand your interest in other peoples opinions.
Ironically I have a T1X .22 in the Oryx but have T3X .204 (Krieger Barrelled) in the Berserk. The Oryx is nice to hold, well made - feels (and looks) like a quality item, it is a proper chassis so has loads of adjustment for comb height and you can adjust the length of pull with extra spacers which you have to purchase. There is a huge choice of MDT, M-Lok etc accessories to jazz it up as you wish. Only downsides for me are 1) Weight - its a heavy bit of kit, I use mine mainly for shooting practise so I don't mind too much because its as heavy as my Sauer 404 (and that is pretty heavy because its a rare one with a steel action instead of aluminium!) 2) It also has a very long fore-end, obviously useful for rail accessories etc but I didn't like the look of it with the short barrel because with mod screwed on it looked like there was no barrel! Mine therefore is paired with a 20" barrel which I think is more aesthetically pleasing. Going back to the weight and with the length of the whole bit of kit it really feels more like a centre fire the way I've set it up - which is fine for me as I said using it mainly for practise but I'm not sure I would like to lug it about after bunnies etc where you would probably want a lighter and more agile set up! The original stock is quite a lot 'smaller' and lighter and paired with a 16" barrel would be great for that I reckon.
The Berserk isn't so obviously a chassis but more of a custom stock (I know that's the same thing really!) It too has plenty of adjustment, even easier than the Oryx because you only have to press a button for both the comb and length of pull adjustment. It is made of a weatherproof reinforced glass fibre material which feels nice and solid with grippy panels around the pistol grip and fore-end where you would generally hold the rifle. The pistol grip is offset (canted!) to the right which makes the hold feel very natural and I do like that. (research done by GRS apparently shows this to be the case!) There isn't any where near the amount of accessories available for this 'chassis' if that's what floats your boat. My only real criticism of the stock is that the fore-end feels a bit too wide and looks a bit too chunky - obviously though you have to remember that the stock is made to fit many rifles and its only the inlet that generally changes. It too is quite heavy but doesn't feel too bad with this gun ( that's not a scientific judgement though !)
Both the Oryx and the Berserk are very well priced compared to other systems I think and both have manufactures with good pedigrees behind them so I think they are good value. Obviously the above is only my opinion and I think you would be pleased with either - hope my rather longer than intended musings help make the decision a little easier.