If all you're using this for is a simulation while you wait for real hardware I don't think there's an appreciable difference as you'll still just have A0 through A7 outputs and don't need to care about anything else.
In the "real world", there's a couple differences. First, the datasheet lists different specs:
250 Vrms, CAT II, channel-to-earth isolation (screw and
spring terminal); 60 VDC, CAT I, channel-to-earth isolation
(DSUB)
And second, if you select the device in NI-MAX and click the "Device Pinouts" button it'll bring you to a different picture.
I think the main reason both versions are in the dropdown is so NI can just use the same list in the dropdown for both real and simulated versions.