I had the Gemini, not the cosmo. However my opinion is the Pro1 is far more useful to me.
TL;DR
My Gemini is fragile, the hinge is plastic, and will eventually break ( and I'm taking good care of my devices ). The metallic plates are locked in place by tiny asperities in the plastic body. This is ageing fast and I start to loose the metal plates just by opening the device. The only good thing is the screen is protected when closed, but, the keys leave marks on it, as the screen is in contact with the keyboard. So use a screen protector film... There is two usbC port, but only one can