I presume that it’s this.. https://shop.nuance.com/store/nuanceus/Custom/pbpage.resp-dragon-home-basics#overview
Unfortunately, there is no side-by-side version comparison that I can find.
Note (from the link above): A Nuance-approved noise-canceling headset microphone (included in purchase). See details at support.nuance.com/compatibility/ (includes USB adapters and digital voice recorders).
Obviously you won’t get a headset with the download version, but if you provide your own microphone it will need to be a noise cancelling type I think.
[@Kal] Note: An Internet connection is required for automatic product activation (a quick anonymous process).
I haven’t decided yet whether to risk purchasing. There’s no trial, but there is, I believe, a 30 day money back guarantee.