I got a Rubato 3 with an orange 6061-T6 Aluminum handle, to go with my Rubato 3 30Cr13 Stainless Steel Handle and 10Cr15CoMoV Steel blade. The one I got today has a 154CM Stainless Steel with black titanium PVD coating. That's the same steel used in my pair of Rutato 2 knives. Those have Micarta and Carbon Fiber Overlay handles. I don't have one with an Aluminum handle, but if you compare the specs of the aluminum handle Rubato 2 with a Rubato 3, there isn't much difference other than the blade shape. Thee R 2 weighs 3.87 oz. and the R 3 weighs 3.60 oz. The blade lengths are 2.93" and 2.96", and the blade thickness is 0.11" on both. Handle length is 4.22" with a lanyard hole, and 3.81" without a hole. That .41" difference is the only big difference besides the blade shape.
Both knives in all materials and finishes come with a challenge coin, except for the cheap steel handle knife. It came with a morale patch instead. The microfiber cleaning cloth is like a lens cleaning cloth you should all be familiar with. I folded it up and put it in the coin pouch of all 4 knives. I did the same with my Spurdog. It's an Assisted Opening Flipper with a 2.99" D2 steel blade with a black titanium nitride finish. Too bad it's no longer listed on their site. I like mine better than most of my knives of any brand. The protruding squares I refer to as a grenade texture is really good and it flips open so easily.