Dash Rendar's ship, "Outrider" held a hyperdrive rating of 0.75 with the use of a modified SoroSuub Griffyn/Y2TG hyperdrive system.
The Millenium Falcon held a hyperdrive rating of 0.5 with the use of a modified Isu-Sim SSP05 Hyperdrive generator.
The articles I've read don't really state that the Outrider is faster, but 0.75 sounds faster than 0.5, and both ships were rated with Hyperdrive Backup Class 10. The Outrider had a Megalight rating of 70 MGLT, while the Falcon rated 80 MGLT. The Outrider had a maximum airspeed of 1,000 km/h (which isn't much faster than Anakin's podracer), and the Falcon reached 1,050 km/h... although, I assume hyperdrive speed is what we're ultimately looking at.
Personally, I never really cared for Dash or the Outrider... they seemed too much like a Solo and Falcon rip-off in my humble opinion, so I don't really know anything about the Outrider except what I've recently read in Wookieepedia and the Star Wars Databank.
Is 0.75 faster than 0.5 ?
"Reality is a nice place to visit... but I wouldn't want to live there."