That's difficult to answer. Xfrog plants are beautiful, for sure. But you need to create lots of it. With Vue plants you have already lots of plants with only one. Both, Xfrog and the Vue Pro plant editor needs a learning curve. Vue plants are much smaller in MB then Xfrog plants and needs much less render time. And even if you don't do animation, the plant editor and the wind feature are absolutely great for stills too. So, you must decide this alone :-)