this chunkier "one prong and two nubs" variant, which is the most common variant, was called SuperPad 64 by both Performance and InterAct and SuperPad 64 Colors (Performance only), and was even released as the SuperPad 64^2 by InterAct
Several variants were also licensed by Nintendo, including the black, blue, green, gold and red SuperPad 64 Colors by Performance, the grey SuperPad 64 by Performance as well as the SharkPad Pro 64^2 by InterAct
Each of these variants licensed by Nintendo were also released without the license under their respective brand name and are indistinguishable hardware-wise
The EA Sports GamePad was licensed by Nintendo and released under InterAct branding
The SharkPad Pro 64^2 includes turbo and slow mode buttons, but the underlying shell is the same as the other variants. In fact, if you remove the cover on the other variants, there are cut-outs for those buttons in the shell
The SharkPad Pro (not 64^2) features the same PCB as the 64^2, but in a three-prong shell.
a variant released in 2001 with a slow mode button in a "a prong and two slightly longer nubs" shell with InterAct branding
Several of the SuperPad 64 Colors series of controllers were officially licensed by Nintendo. Variants released without the Nintendo license are identical hardwise-wise and only differ by packaging. The SuperPad 64 Colors (the chunkier style, not the InterAct branded releases with the slow mode button which were never licensed) releases that were licensed by Nintendo were released in boxes similar in design to Nintendo's own controllers and featured the Nintendo logo on the package. Non-licensed releases in these colors had boxes with a plastic window that displayed the controller, aside from the gold color which released in a cardboard box. The gold variants also did not have the SuperPad logo on the face of the controller like every other release in this variant.
Performance later released SuperPad 64 Colors variations in translucent colors: Black Ice, Blue Sky and Red Storm. These were released in blister packaging and weren't licensed by Nintendo.
The SuperPad 64 releases (no Colors branding) include a grey variant (released by Performance, both licensed and unlicensed), the EA Sports GamePad (released by InterAct and only licensed by Nintendo), a "Hyper Blue" color under the Prism Color Series by InterAct (licensed), and a clear variant (unlicensed and released by RadioShack, but has no Performance/InterAct branding and mentions that the SuperPad 64 name is a trademark of STD Manufacturing, Inc.).
Trivia
Nintendo eventually licensed the SuperPad 64 controllers around 1998. The red SuperPad 64 Colors controller has two box variants - the initial release has a clear plastic window displaying the controller whereas the licensed release has the Nintendo logo in the bottom left corner.