NEED TO KNOW __ VIBRATO PEDAL | TREMOLO PEDAL | WHAT'S THE DIFFERENCE?

VIBRATO? TREMOLO? WTF

On a casual listen they both can seem to sound the same. They both modulate.

They however wobble two different things.

Vibrato modulates the pitch just like a whammy bar. Push the bar down and E note heads to E flat and pull up it heads to F.

The sound is crisp and pronounced. 

Tremolo changes volume it makes your sound go loud, quiet, loud quiet, etc. 

The sound is mellow and tranquil.

TRIVIA

Leo Fender got it backwards. He called his Strat whammy bar a tremolo and the tremolo on his amps vibrato. This is the main reason over the years why many players became confused.

the fine print 

I prefer the Termolo.  I have a Uni-Vibe which is it's own thing but it does indeed  have a vibrato in it.  
I stumbled onto a Boss clone. The Axsess by Giannini Tremolo. __ $35.00 USD from Only Pedals