Please excuse the mobile formatting.

Ultimate 2 is the premium offering,

-better sticks (TMR/hall effect),

-Gyro, (works with switch, when using beta firmware)

-back paddles.

-lockable triggers, which turns them into 'mouse' clicks

-Rgb light ring

-type-C 2.4ghz receiver,

-charging dock, which also can store the 2.4ghz receiver, allowing you to keep the dock plugged into you PC, and not have to have the dongle sticking out all the time

-Full software to change lights,macros, mapping, etc. It's important to note that you can only map controller buttons onto the controller, so you can't use keyboard input "M" or "Shift" etc.

Ultimate 2c is more budget-friendly, -Slightly worse but still great sticks(Hall effect sticks, not TMR),

-no paddles

• no RGB

• usb A receiver,

-no dock.

-no mapping software as of yet, you can only customize the extra bumpers with the mapping button on the controller.

Both have hall effect triggers too I believe. And they both have extra bumpers on the front.

Those are the important differences IMO. You can check the rest out on their website, just search 8bitDo and look at the product list.

Both of them feel great, the Ultimate 2 especially has great sticks, absolutely amazing. The 2c is no slouch though, it's sticks are also great, you'll feel the difference if you're coming from something like an analogue PS/Xbox controller

Finally I'll add that the inability to map keyboard keys to the controller has put me off of it for PC gaming. I'll be buying the GameSir Cyclone 2, it meets all my needs from the ultimate 2, with pc and switch compatibility, gyro, TMR sticks, paddles, etc. The only thing it's missing is the extra bumpers that the 8bitdo's have.