Mionix Naos has an ergonomic design that heavily favors palm, as in it even has a wing that sticks out on the right side of the mouse where your ring and pinky finger are supposed to rest, so unless your claw grip leans far more towards a palm than finger I would avoid this one the most. I'm sure there are some people who have this mouse and claim they claw it, but I just don't see how it would be comfortable.
Razer Lachesis is supposed to be designed specifically for claw, but I just never got used to it. From what I've heard from others it seems to be a design you're going to either love or hate, it could be perfect or just a total disappointment. But I am a mostly finger grip with average sized hands, perhaps if you have larger hands it might be worth a shot, but I can't be confident in a recommendation of it over the next two mice based on my experience.
Steelseries Xai has a design that is the most ambiguous of the bunch when it comes to ergonomics. It can be gripped in just about any style, however I have found its slightly better for finger than claw, and while it can be palmed its not the most comfortable or natural feeling for palm grip. It has some of the most unique features of the other mice such as the ability to completely program it from the LCD on the bottom without installing the "driver" (the Xai's driver isn't really a driver, its just software to make it easier to program the mouses' settings, the drivers are located entirely on the mouse itself). That being said, its probably one of the most buggy when it comes to software, programming macros is a nightmare. But this is my favorite and thus current mouse of choice for my finger grip.
Logitech G9x really is most likely your best bet even if it is the most expensive. It comes with two interchangeable grips, its default grip with the rubberized coat is one of the most comfortable and natural feeling claw grips I have ever experienced. Its alternate grip (the rough plastic) is intended for the finger grippers like myself. Logitech's software is also amongst the most reliable and least buggy. And their warranty is second to none, basically 3 years super lenient replacement policy and even if your 3 years is up they're likely to offer you a 50% off coupon from their online store just to try and keep you with them.
***all of the mice above have internal memory that all you to fully program them (up to at least five different profiles worth) so that you could then uninstall the software/driver and have the mouse run the same as programed on any computer you plug it in to.
I hate that term because it's not descriptive. Which is claw? Moving the mouse with your fingertips? If so, the G9 is perfect for that.
The Razor mice are only good if you're left handed, otherwise you're giving up ergonomics, never heard of Mionix, and the Steelseries mice look huge and also symmetrical so bad ergonomics.
Claw is in between palm and finger, its where only the back part of your palm touches and your fingers are arched far more making your hand look like its about to claw something...
finger is where only your finger tips touch the mouse
palm is where your entire palm is flat and rested on top of the mouse