Scooters use a simple centrifugal clutch, and below a certain RPM, drive is entirely disconnected (no creep).
A torque converter is always 'connected', so you get some creep - many users like this as a lazy way to handle slow, stop-start traffic.
Apart from ASG, the other two systems are: DSG (using two clutches, so gears can be preselected for very fast gear changes) but no creep; and belt-and-variable-pulley systems, which may be CVTs or 'fixed interval' systems to simulate gears, both of which may or may not creep depending on the make (and vintage!)
IMHO, ASG is the worst of both worlds, being a manual gearbox and clutch, but with electrical and electronic add-ons to automate human action. It's the add-ons that seem to go wrong! If I wanted an auto, I'd only consider DSG or torque converter - while being complex, they are far better developed and exist in huge numbers. ASG's are a bit of a rare peculiarity.
In face-lift form especially, UP!'s, Citigos etc have nice gearbox and clutch actions.
https://www.autoexpress.co.uk/volkswagen/up/61316/volkswagen-asg
[not that autocar have much of value to say generally, beyond reformatting car company press releases!]