The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads.
IRF1010E is an n-channel enhancement MOSFET designed for high speed switching applications. It also has low turn ON resistance. Like any other MOSFET the IRF1010E is voltage controlled device and MOSFET state is decided by GATE voltage.