Output current sourced/sunk by comparator
If you don't care if it works and about reliability, then you are correct. In general you should never use 'absolute maximum' ratings for designing limits of normal operation- only to get an idea whether the device would survive a brief abuse of that magnitude.

A more conservative number is the current at which the maximum output 'low' voltage is guaranteed- 4mA. A prudent designer would derate that for the fact that the guarantee only holds for 25 degrees C - it would typically be worse at low temperature, so maybe 3mA for 500mV max drop. 

 

Your interpretation of the Linear datasheet is correct- the load can be connected from the output to a voltage rail that is higher (or lower) than the chip supply voltage.