The regular versions have a 3325 sensor, the Pros a 3389.
The Mensa is 115x68x39mm. Weight without cable unknown, but with cable it's 126g.
The Vega has an interesting shape as well, not sure about its weight and dimensions.
Twitter teaser post: https://twitter.com/Galax_Xanova/status/992243282561257472
Youtube preview (@1:55):