Transistor vs FET
Field Effect
Transistor.........
Yes, the gate is more sensitive. Also, when I use FETs I usually don't save any parts: a BJT gets a base resistor, and a FET gets a resistor from gate to source to keep it turned off if its driver tristates (okay, that's a MCU problem only, in general). The gate is a capacitor, and will hold charge if there's nothing to discharge it.
Lately, I've been using
these a lot. It's a BJT with resistors integrated: a base bias resistor, and a pulldown resistor from base to emitter. Just one part, and quite robust and easy to use. Of course, they cost more too.
For higher currents, however (I'd consider this at 175mA), the MOSFET will be more efficient, if you get one with nice, low resistance. BJT V
CE(sat) doesn't go all that low, typically about 0.2V for moderate current, whereas MOSFETs with R
DS(on) well below an ohm are easy to find.