The Millie is pretty good, but mine had blade play in a death grip due to my finger somewhat moving the lockbar. It's kind of disappointing but not a deal breaker. The Millie handle shape, particularly the swell at the butt, makes it great for retention and security in hand, and this is something that the Resilience really lacks. The G10 on the (204P Sprint) Millie is twice as grippy as that on the Resilience, and the Millie handle is just way lighter than the Resilience handle, and better balanced. The Resilience is handle heavy, which some might like for a work knife.
All that being said, if you are a tinkerer, the Resilience is a great choice given it is a fraction of the price of the Millie. It is not a slippery handle, despite not being as grippy as the Millie. If you want to lighten it up, just disassemble it and cut out the material between a few of the holes in the liners, and you can get close to the weight and balance of a Millie. 8Cr13Mov is not great for edge retention, but it is very tough, and corrosion resistant enough for at least my neck of the woods (inland, Ontario Canada). As a bonus, it takes a mirror polish quite easily, if that is what you want, and it sharpens to an extremely fine edge. It has good, if not great edge stability, and I have thinned out the flat grind on two of mine, including the one I still own, without any issues. Again, if you're a tinkerer, it is a great knife to get because its 4.25 inch blade can be modded into just about anything you want it to be, including a Militaryesque profile. And get this: two out of three Resiliences I've owned had less blade play or wiggle out of the box than my Millie.