I think this is a difficult question to answer. Usually Honda owners, and Nissan owners are quite different in what they want. Also, the two cars are very different in many ways.

I guess if you were just joe blow off the street, and only looking into the value of the cars, and thier swapped motor...

92 240SX + SR20DET = 2000+3500 = 5500
92 EG Hatch (CX) + GSR = 1500+3000 = 4500

All of this depends on how much you get each car for, and how much you get the swap for. *shrug* It's a toss up really. I would perfer the SR20, just for the RWD, and the potential for more horsepower is less expensive.