I don’t have a Cronus and it’s been a long time since I’ve used one and don’t believe it was the current generation.
I do have an XTR3 3.3-18i here (had 4 of them not that long ago) and an Athlon Helos 4-20 which is a much lower end model than the Cronus and that Helos is better is just about every way than the XTR3. I’d say the turrets and reticle design are about equal with the Helos being a little easier to pick up on the low end but everything else goes to the Helos. The magnification, illumination, and parallax controls are smoother and less stiff, the illumination control isn’t like a circular saw blade, the image and glass quality is better, and the image quality doesn’t suffer on the higher magnification like the Burris does.
I couldn’t tell you if the FOV is larger on one or the other though. People like to tout that as an advantage on the Burris but if it is larger it’s not enough to make a noticeable difference in actual use and it certainly doesn’t make up for all of its other shortcomings.
I’d buy the Cronus over the Burris all day if those are the two options. Or a Helos and a case or two of ammo. Or a MK4HD, Bushnell Elite or any one of a number of other optics over an XTR3.