I think in terms of the quality of the libraries it's pretty similar, but Dreamcast had some amazing new IPs that the Wii U can't compete with. Aside from Splatoon the best Wii U games are all Nintendo sequels, whereas the Dreamcast had Jet Set Radio, Shenmue, Crazy Taxi, Samba De Amigo, Skies of Arcadia, Space Channel 5, etc.
Nintendo's Wii U games are of a very high quality but they are almost all straightforward sequels aside from W101 and Splatoon.
Nintendo's Wii U games are of a very high quality but they are almost all straightforward sequels aside from W101 and Splatoon.