I recently switched from guitar to bass. Even though I have played for years and years, I'm a complete bass noob. So I am kinda baffled by all the new options I have at my disposal. I am looking for a sound that cracks up just a bit, just like a slightly overdriven tube amp would. I researched around a bit and noticed and many of the popular pedals that provide that kind of sound are called preamps instead of overdrive pedals. What is the big difference between a normal overdrive/distortion pedal and the one they are calling a preamp? For example, what I gather from the specs of Sansamp VT bass (a distortion pedal, I assume) vs Sansamp Bass Driver DI (preamp, right?) is that the latter has more EQ control and a cab simulator. Is there actually a categorical difference between a preamp and an overdrive/distortion pedal, or are the distortion pedals just preamps without DI and lesser tone shaping settings? For example, apart from the DI, $30 price difference and a slightly different tone, what would I be losing/getting if I chose to get a VT Bass rather than the Bass Driver DI?