I don't disagree, IMO, the Terragen one is still better. But of course, it's the one which I tried to duplicate, and not the other way around;-)

If I were to improve on the render I'd do the following:

1. Fix the water...the chopped procedural water of Terragen has always looked CG to me, and is a dead giveaway it's a TG render;

2. Add reflected light

3. Add fog and haze

4. For ultra-real, I'd have to add some vegetation. Another dead giveaway for the TG look is the lack of any scale defining element or vegetation.

I still feel Vue is only a couple killer mats away from creating renderings which equal Terragen. And I agree with Bruno, I've yet to see a Terragen2 render with 'veggies' which looks right.