What is the Difference Between MOBITEK Q24 STK MODEM HUB Model STKMH-US401-C and STKMH-EP432-C

Model: STKMH-US401-C — connectivity is USB
Model: STKMH-EP432-C — connectivity is ethernet/LAN

MOBITEK Q24 STK Modem Hub_STKMH-US401-C_Back_2560 x 1920

Model: STKMH-US401-C — connectivity is USB

MOBITEK Q24 STK Modem Hub_STKMH-EP432-C_Back_2560 x 1920

Model: STKMH-EP432-C — connectivity is ethernet/LAN