Perhaps they felt it was only worth the effort to list competitors available nationwide like the Volt.
Why compare it to anything else on your own web site? Just promote all it's positive attributes. Let the consumer find out it's competition on their own.
Looks like the GM card redemption allowance on the Volt is limited to $1000.00. Later on this year they may increase that so I will try to become familiar with the vehicle and research to find the best deal available.
GM Card customers prior to around 2000 don't have redemption limits, only the limitation on $500 "earnings" per year for 7 years. I understand the newest cards allow unlimited redemption limits also, but are based on 2% of purchases - not 5% as it was previously. I'd expect the GM incentives to get better as we approach September, though.