Sadly there is not an easy way to determine which one they used or which you need without the original.
You can do a fuse test when you have a gasket in place but without it it's tough.
Here is on thing to try, manually turn the engine till the center piston is almost to the top, set the head on top of the block with a couple bolts loose, then turn the engine till the head rises to the highest point if it rises at all, and then with feeler gauges measure that gap.
If there is no gap then it's all up in the air as far as which one will work.
If you get a gap then that will be under what you need for a gasket, so example if it measures 1.2mm you will need the gasket one larger.
Then after you install the new gasket you will need to do a fuse test, and a pressure test BEFORE YOU RUN IT!
If you don't you risk serious damage.
The other option is to start with the largest gasket, do a pressure test and ajust down till the pressures are right.
This is real risky with a non rebuild engine as bad rings or valves will throw all the measurements off and you run the risk of slapping the pistons into the head with catastrophic consequences.
