Looking at the Cobalt and GP, the Cobalt will be faster because its smaller, the technology is better since they still make them where as Ponitac has gone bye bye. if they were in bussiness then maybe may have made a better GP, wait it think they did its called a G8GT but i think the G8 is our of its class. Saw on youtube a G8 GT beat a Cobalt SS that had Stage 2, but i think the SS was S/C not T/C. Also the Cobalt has better shifting i think too, So i think the LNF>3800 BUT they both are better then other cars of its class. I think
About the auto HHR yes i saw a chevy forum were a guy did that and got a time of 14.1 on the HHR with a trap of i think 109MPH. Then i read a the shift could get a mid 13 sec on the 1/4 mile, with a good driver that is. As far as saftey i think both cars will fair well in a accident like the one you showed of the Cobalt.
I like the Cobalt but i think id rather have a little slower but cooler GP, If it takes me more mods on the GP to beat a cobalt so be it. I like the GP what can i do/say.