I would say it would all depend on both drivers and the actual mods to the Supra. If he can spool properly from the line and get a good launch, I would imagine to say the Supra would win.
*Taken from http://www.suprastore.com/450hppackage.html

So what is in the 460hp (crank) Supra Package and how much does it cost? Easy.

** This Just Added to FAQ Section Because of Good Info **

1. Downpipe 2. A'PEXi N1 Exhaust System 3. GReddy BCC 4. GReddy Profec B-Spec Electronic Boost Controller 5. 60mm Greddy Boost Gauge.

Check out Zach Pruett's 1994 BPU™ (BPU ONLY) 6-speed Supra dyno above, 430 RWHP and 442 ft.lbs of torque to the wheels. This equates to 505 HP at the crankshaft. Look at the green line and see how smooth and flat that power curve is! A fluke? Ask Ryan Woon about his 1998 BPU™++ car that dyno'd 433rwhp at Vegas '99 in front of 50 people! That is 500hp at the crank my friend!!

APPLICATION: 1993 to 1998 Supra Twin Turbo

Some have asked, what type of 1/4 mile ET and Trap Speeds should be expected. Trap Speed is the easiest indicator of true hp, with ET being much more driver dependent because the times are heavily changed by a good "launch". With this kit installed properly your car should run from 111-118mph in the 1/4 mile. If you can launch your car to a 1.8 60 ft. time, you may well be in the 11's on drag radials

 

I guess the dyno numbers stock vary greatly just like with LS1 cars. I've seen dyno sheets of them with around 300 RWHP. Although I also read a few reports of 280-290 as well. Of course different dynos can produce different numbers. The 1/4 mile times reported for this 3500 lb car seem to indicate 300RWHP. The one stock 93 automatic I test drove felt every bit as fast as a loaded LS1 F-body automatic.