How to choose a MAP sensor?

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This should be a really simple question, but I'm not sure that it really is.
I am looking for a 1 BAR sensor, nothing special. I have seen a few different GM units out there that all look the same, but the pricing varies.
Does anyone know if there are differences and what they might be? Is one better than another?

TIA!

[MonzaRacer]

for what type of application?

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Speed density EFI, single plane MPI intake, 4BBL throttle body. Naturally aspirated.

[MonzaRacer]

Just get one for TPI GM engine from Late 80s,,,, Camaro/Corvette