how strong steppers are?

test on 2 steppers, nema 23 and nema 24 in cnc machine. lead screw 1605 which is 5mm travel per revolution. Driver gecko540, Z - Dual Shaft Nema 24 CNC Stepper Motor 4Nm (566 ) 60x60x100mm 8 Wires X - Dual Shaft Nema 23 Bipolar () 57x57x76mm 4 Wires