The audio specs are for a v1 because it does not include Audible (.aa) among its supported audio formats. The additional memory spec says MicroSD, not the MicroSDHC that is supported by the v2.
But lots of sellers just cut-and-paste specs and don’t check them against the unit. So short of contacting the seller somehow, you’re not going to be able to tell.
J&R, one of the other sellers, is a very reputable New York City store. You could call them and ask them to look at the units they are selling. Might be worth the extra $12.