im nto sure what the standard speed sesnor output is,, but theres a simple way of testing,,,, connect a multimeter too the output (im guess it would be a square wave) and see if its a positive wave or a negative!

if its a positive wave you need a pnp inductive pickup
if its a negative you need a npn inductive pickup

when you say magnetic sesnor i think you mean inductive and not a hull effect

how many wires go too the standard sensor? is it pos/neg/signal?