It all depends on where the rpm is restricted to.
If the redline is <7k I will take a SC
If the redline goes up to 8k or 8.2k I will take a turbo. More effecient a higher RPM and more room for tunning (cheaply) v/s a Supercharger.
Turbo will work great on a high rpm vehicle. Supercharger looses its salt value in the top end.
If the red line is 8k....that's 5000 rpm to play with without getting a "butt kick" or unexpected rise in boost/hp and torque. Most turbo induction systems are in full boost around 2-3k factory (OEM).
If there is a 7k redline supercharger will be good for 5k as well. 1k rpm to 6k (starting to loose efficiency at this point)
Also all depends on the turbo etc..
If this is an aftermarket option I would say none of the above unless a TRD version comes out with a F/I option.
Last time TRD offered a supercharger for their "sport" coupe (Scion TC) it only added 40 crank hp...and was known to fail often without upgrading the pulley. It wasnt even the S/C that would whine (centrifugal vs. ROOTS)
All up to what the options are. If the car weighs under 2700 a good NA build will be more than sufficient unless you are drag racing. Otherwise I can see 50whp and 30wtrq and good increase in power/sound/feel as being sufficient.
If they are going to squeeze 200hp out of a 2L engine, it will cost money to get 300hp (ITB's, Cams, Long-tube's, Fuel: E85/93oct Premium) 250 crank will be the most realistic goals in terms of $ per H/P vs. Forced Induction. Not to mention, the compression ratio will not be favored for forced induction unless they change that with a forced induction version. Otherwise you will need pistons, forged internals, fuel system upgrade, fuel upgrade (premium or E-85) to handle higher temps and prevent Detonation.
So if toyota releases a TRD version with a forced induction option, it will all depend on the compression ratio and the redline.
And out of the 2, turbo is my favorite
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