The Quick 3 has a few upgrades that I think make the extra $230 worth it, including Rear Derailieur (Deore vs. Alivio), Tires (Conti vs. Kenda), Rear Cogs (9 speed vs. 8 speed)...

Whether you'd notice these improvements is debatable and better left for someone with more knowledge to answer...there are a few more differences than the frame though.