[GT40Racer]

I am thinking the finer detail comes because plastic printers squeeze melted plastic out of a nozzle whereas resin printers use a screen to expose UV sensitive resin to UV light using smaller pixels than the size of the nozzle.

Also the plastic printer mechanically move on the XYZ plane to put down its layers whereas resin printers only move up and down and the layer is put down by light exposure not squirting melted plastic there would be limits to the quality of the parts that control the precision of the moving parts on the plastic printer whereas on the resin printer the computer maps out a grid coordinate based on the screen resolution (eg my printer has 4,096 x 2,560 pixels)