I just found this statement by a mod on the Graviteam forum, last month:
DVD version has very low priority and will be (if will be at all) updated far less frequently.
Sounds like the DVD is a con, to me - file 13 job and no more purchases from that dev - and I don't care how high the standard of their actual sims are. If this statement is fact, why still sell the boxed version?
Oh, and a relevant review on the Amazon product page, too.