I've replaced a TRD M45-based charger on a corolla before with a stock secondhand MY08 WRX TD04L turbo on home-made manifold etc. Totally woke the car up compared to the TRD charger, gave it a much wider powerband and made an additional 30kw at the treads with 3psi less boost. The transient response and general throttle response is as good if not better than the TRD charger setup, the fuel consumption also improved considerably with the turbo setup.
The TRD charger sounded cool, but the turbo setup is much more fun in a daily driver
I like all different setups, but I'll be turbo'ing my 86 with a normal GT28R for response seeing it's a daily driver.
Vid's of the corolla I've referenced are here:
Supercharged [ame="http://www.youtube.com/watch?v=favjur3UDCY"]ZZE122R with TRD Supercharger Dyno Run - YouTube[/ame]
Turbocharged [ame="http://www.youtube.com/watch?v=H5S6hcDXIJo"]1zzfte dyno run - YouTube[/ame]
I'm a big fan of high compression forced induction