You've done a fantastic job with this map already, Sue - the level of detail is stunning! Of course, it may be that I'm not used to so much detail due to my limited exposure to CC3 maps, but it's still strikingly varied, yet cohesive. Bravo!

As for the new trees, I'm not sure they're an improvement. I don't quite know how to articulate it, but they seem somehow "harsher" in contrast to their surroundings, if that makes any sense. In comparison, your earlier trees seem to blend better with the ground while still being distinct from it. Perhaps a mild blur would help soften their appearance? (Lacking any formal art training, I'm not sure what exactly would make the new trees look more like the older ones, or what kind of effects you can apply to them in CC3, but this is my advice as a relative newb.)

All that said, both kinds of trees look way better than anything I could draw from scratch, so kudos on getting them to look so good! The new trees might not even look that different next to the older ones, but that's just a guess on my part. Keep up the great work!