Both are very different in their ride quality and handling. Honestly I love driving both.
The Prado is nimble, you sit high and have a great vantage. Surf hugs the roads, rides softly and is pretty fast as well. Both are auto and both are pretty fast, so really cant say which one is faster, probably prado since its lighter but at high speeds i feel more in control in surf.
By the way am selling the surf, so let me know if anyone is interested.
I also have a fantastic v6 3000 cc petrol 1992 Surf. Its super silent and in mint condition.