The compressor in my AC unit has died and quotes I've been provided with indicate that it is cheaper to replace the entire unit rather than replace the compressor. The unit is a TRANE WSHP model GEHB018.

I received a couple of quotes to replace it with the equivalent (though slightly larger 2 Ton unit) Trane GEHB024 and an equivalent Carrier Unit which I've been told will fit in the tight space available.,00.html

The Carrier is a few hundred dollars cheaper and I've been told they are identical units but "rebadged". Is this a true statement?

Which unit should I go with and why?

Thanks in advance.