I used a set of Cometics on a 410 build with Edelbrock heads. The decks were messed up and the block wasn't bored yet so I had no way of dummying it up to measure the deck height. I had the decks squared decked, and once the block was bored and torque plate honed, line bored, etc. I dummied up the assembly to check deck height and piston to valve clearance in case I needed to flycut the pistons... before I had the assembly balanced.
The pistons turned out to be .014 in the hole, instead of re-decking the block for zero deck for an additional 100 bucks, and using the normal .041 thickness 1020 Felpro gasket, I left the block alone and used the .027 Cometic to get it where it would be happy. I used the 4.160 bore gasket for the 4.080 bore. The reason for that was the Edelbrock heads have a chamber that is 4.160 wide and I didn't want the 4.080 bore gasket to be hanging out under the head (in the chamber).
You can get lots of different gasket thicknesses from for the FE and with bore sizes of 4.080, 4.160. 4.250 and 4.400. I always wondered why the didn't do a 4.310 also..... maybe custom. They open up the gasket bore bigger where the intake valves would direct the flow cone, or where the blocks would be "notched" or relieved, for large valves... a little more than I think is needed, but they probably know more about this stuff than I do!
With the difference it bore diameter and the thickness of the gasket there really isn't that much difference in CC volume to get too concerned as far as "loss" of compression. Use one that works best for your combo... lots of choices!