The only reason why it might not be compatible with compressions is if it comes in an odd size. If you have ordered 1/2"ID/3/4"OD or whatever size to match the compo fittings you have then it will fit, nothing else matters. I've looked at their website and there is nothing magic about this tube, it is pvc like all the rest.
Edit: They also do non pvc tubing with no plasticisers, Ether-PUR FLEX 84, this is probably the best stuff for water cooling, but again, no earthly reason why this should not be compatible with compo fittings assuming the correct size is bought. The only tubing which is not compatible with compression is reinforced wall tubing, i.e. that with the kriss kross pattern within tthe wall of the tube, but who uses that for water cooling? The other possible reason would be that it is so flexible it would buckle when tightening the fittings. I had some tube that was like this a while back, fittings would go on ok with care but the tubing was so flimsy the bend radius was abysmal. Ditched the lot.