I’ve got both stocks; the synthetic is the one on rifle. As much as I like wood, I prefer synthetic since:
It seems a little lighter than the wood.
The pistol grip is very slightly smaller around (and I got short fingers!).
The wood is smooth (and slippery) while my synthetic has molded in checkering.
My synthetic is Springfield Armory but may be different than the one you’re looking at. They have (or at least used to have) two synthetic stocks, one with the military buttplate (the one I’ve got}, and a cheaper one with what I can only describe as a non-standard buttplate. Since the price is lower, I suspect you’re looking at the second stock, so everything I listed above is meaningless. If my assumption is correct, make sure you can live with that buttplate.
Great gun – it, and the FAL, are the ultimate examples of the traditional battle rifle!!