Unless they're heavily retooled (which is possible, I guess), historically they haven't been able to fit a large enough LFP battery into the Model 3 to meet the EPA range of the 'Long Range' version.

Also, the Performance version of every car Tesla makes has used an identical battery to the 'AWD' (or, Long Range) battery. You can tell, because the range is slightly reduced due to the additional motor and/or larger tires.