Generally this contest would be a little more balanced but thanks to the $20 MIR at NewEgg the Corsair Carbide 200R is a mere $30 while Antec's Three Hundred Two will run you $70.  Both cases have a similar look, with the Corsair case being slightly shorter and thinner but longer than the Antec offering.  Both can handle heatsinks up to 7" (17.7mm) with the Corsair case able to handle GPUs of up to 16.5", which is 4" more than the Antec case.  Then again only the Antec case is set up to handle mini-ITX motherboards, which makes planning your system ahead of the purchase of one of these cases a very good idea.  The Tech Report compares these two cases in their latest review, see which case walked away with the award.

"We've compared the successor to Antec's famous Three Hundred enclosure to a new, similarly priced entrant, the Carbide Series 200R—Corsair's cheapest enclosure ever. The results may surprise you."

Here are some more Cases & Cooling reviews from around the web:

CASES & COOLING