If you are strictly looking for a .30-30, then I'd say Win for the win. Lighter, holds better value. Those are the two benefits over a Marlin 336 the 94 has IMO. If you aren't looking for a specific caliber I'd say get a Marlin in 35 Whelen or Remington, or a Savage 99 in a higher-powered caliber. The Savage has a robust rotary-style internal magazine that is better than both the Winchester and the Marlin. The Marlin is also extremely durable, pre-Remington guns are very nice. Guess you really can't go wrong.
Don't know how much you trust it, but here is a general shake down of the question you're asking:
http://www.chuckhawks.com/compared_marlin336_win94.htm