Murray. He's reached 3 finals, Tsonga's reached 1.
Murray's first might have been a dream run like Tsonga's, but this year in particular I was really impressed with the way he reached the final in Australia. He wasn't playing his best and yet it was good enough to win 6 matches and reach another final.
Tsonga's been playing brilliantly but historically I'd have to favour Murray. 8 times he's reached a semi final or better (all four this year!), Tsonga's done it 3 times.