Less parts than can go wrong, so yes, in theory it's a bit more reliable. But over all it's more about what you do with your car. If you plan on bashing it on an open area, sensorless is enough, as you'll spend very little time (or attention on) going slow. If you plan on racing (or just driving on a track) sensored makes more sense, as you need a smooth running car even in the slowest corner.