Brother I believe both are Good. No harm, in choosing for any of these.
I am not sure, but I think price only fluctuates with model (new VS old), some features, shashkaas, etc. added, which may not be necessarily reqd. by all.
At the end, main thing is the compressor, condenser, evaporator, the tech., copper tubing and gas, which I believe is same and common across all model ranges.