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This is caused by the models being different architectures. The LM2904 model you had included in your schematic was a simpler model developed by national semiconductor. We have since updated this model with a more complex architecture that shows more of the device behaviors.
The newest model can be found at the below link under design tools and simulations:
On the output of the LM2904, there is a 50uA constant current sink. This may result in some non-linear behaviors on the output when you switch between sinking and sourcing current. For more information on this please see section 3 in the below application note.
Shifting your input voltage up by 3V fixes this for the LM2904. LM2904B has a stronger constant current sink driver, so to fix this you have to shift your voltage and increase the value of your resistors to 10k.
