the TST will add more overall horsepower and is a perfect match to be paired with a MAD ECM. the JVD is as well. both are fueling only boxes. the JVD is a bit less harsh on defueling than the TST.
the comp has more quickness as a standalone unit due to its ability to add some timing down low.
Both paired with the MAD ECM, the jury is still out. i'm leaning towards the TST however. I have a TST PM3 off road or "competition" version.