The left one appears to be a "traditional bug" a Vibroplex "Lightning Bug" model I think. Traditional bugs are somewhat different from modern "keyer paddles"
A modern "keyer paddle" is a precision center off momentary double throw switch, sort of. 3 terminals, a common, a "dot" and a "dash." The wires go to an electronic keyer, and as long as you hold the paddle to one side, the electronic keyer makes a string of "dots" or "dashes"
Traditional "bugs" generally work differently. A "bug" you make dashes manually by cycling the paddle pushing it towards the right of you. Just like a telegraph key, only you use it to make only dashes
When you push the bug paddle to your left, there's a lever/ pendulum, with an adjustable weight, and a flexible part, which allows the pendulum to cycle by inertia for a "little bit." Properly adjusted, it will make "dits" (dots) for a time.
There were complicated "fully automatic" bugs that made both dashes and dots automatically
Example of a Vibroplex (brand) "Lightning Bug" (model) This is damn poor CW. I would not be happy with this
Below, this is what a "good fist" should sound like