Someone pointed this thread out to me, I figured I'd reply, just to set a couple facts straight
The VW Corrado was available worldwide from 1989 until 1995, and in the US from 1990 until 1994.
In the US, it was available in two forms - G60 and SLC. The G60 was sold from 1990 until midway through 1992, and the SLC was sold from mid 1992 until 1994. The G60 Corrado was the only car VW ever sold in America with the supercharged G60 engine, and the SLC was VW's first VR6 car in America. Elsewhere in the world, the Corrado was available with VW's plain 16v (136hp) and 8v (115) engines, and there were even a couple pretty rare limited edition models - the Storm in the UK, and the Jet in Germany.
The G60 makes 158 hp and 166 lbft stock at the crank, and the SLC (vr6 engine) makes 178 hp and 173 lbft stock at the crank.
The g60 engine has a g-lader style supercharger on it, which is a pretty old design (dating from the 1800's!) that only recently has been technologically feasible. The engine is intercooled and produces about 10 lbs of boost, stock.
The g60 engine is very easy to modify, $500 in upgrades can bring you near 190 wheel hp - a G60 with typical mods will easily be faster than an SLC - the G60 is easier to tune and weighs less, too. Also, the g60 Corrados have shorter gearing, and slightly better suspensions.
Stock, they're both more or less 15 second cars, and both can be in the 14's without much effort at all. Breaking into the 13's requires a fair amount of work on either car, though.
Some people mentioned the Scirocco - that was, in a sense, the precursor to the Corrado. The Corrado was never sold badged as a Scirocco, though they were sold side by side in Europe for the Corrado's first few years. Both the Scirocco and the Scirocco II were built on VW's A1 platform, whereas the Corrado is built on VW's A2 platform. They're both fairly rare VW's, though there were many more 'roccos build than Corrados. The 'rocco came with either a 8v motor or a 16v motor, the 16v version making 136 hp.
Someone also mentioned the G60 engine being "a supercharged version of the 130hp engine" - that's not really true. The "130hp" engine is VW's early 16v engine, which has almost nothing in common with the g60 engine. The g60 engine has 8 valves, and is in some ways similar to the early counterflow 8v engines on A1 and A2 VW's. A lot more was done than just slapping a supercharger on:
-different pistons
-block has oil squirters to cool off the pistons
-the exhaust valves are sodium filled
-compression ratio is different
-head is cast using a different (stronger) process
-throttle body is different
-cam is different
-fuel injection system is completely different (uses VW's proprietary digifant-1 injection, most other counterflow 8v's use Bosch mechanical CIS injection)
-obviously has a 'charger and all associated equipment - intercooler, boost recirc system, etc etc etc.
I'm sorry to hear you ran into a Corrado owner with an attitude, most Corrado people are pretty cool, respectful people. Since it's a fairly rare VW, they're usually found only in the hands of enthusiasts. Unfortunately, as with any car, as they get older they're getting a lot cheaper to buy, and thus they're starting to pop up in younger, less knowledgeable hands.
If you run into a Corrado in the future and are wondering which one it is, look for the SLC (or vr6) or G60 badging on the grille and on the hatch lid. And watch the back end when the car hits 45 mph or dips down below 12 mph.