TS is the better game. The art on the pf/cabinet is nice, but unless you are running the alternate speaker panel/translite ick. Tough game, plenty to do. Video mode is a little better than DW.
Dr. Who is the better theme, if you are a fan of the show. Otherwise the colors and art scream seventies plus the Dalek's Destroy voice bite will grind on your nerves.
Dr. Who is not nearly as deep. The Time Expander is an excellent, albeit pita to fix, toy. The video mode is fun enough. Each doctor gives different advantages as to what to go for which adds some strategy. In a collection of six, I found it did not have enough legs even though I was a fan of the show. Wouldn't mind another one back but as a trade, no bad deal.