Same engine and frame I believe. Heck the SS model has an automatic/Turbo combo.
2010 Cobalt 2LT Victory red Coupe
Mods: Tinted 50% ceramic all around, factory spoiler, 2008 LE5 2.4 Throttle body, GMPP Intake, Walker stock exhaust system (back to silence), TruBendz/MBE 2.5" catted Downpipe, HP Tuners by Chenry Motorsports, Alpine CDE-151 with USB port, Rockford Fosgate 300-10
Yeah man, don't leave!!! No way. Like Blazer said it's a balt with a different body on it. Heck, you can even still enter YCOTM with it. We include Cobalt, HHR, Ion, Cruze, and G5. No reason to abandon us...
I can see why you would trade for it. My dad has an orange one, and it's like having a Cobalt, but only 100x more useful. He can tow a trailer, and haul stuff.
They look the same, but I don't know if they are interchangeable. Did you try to keep you awesome engine cover? Did it fit?