What do you think your timeline for each will be? Generally after collecting you should not touch the trees for two years to allow the root systems to fully recover.
This boxwood will be 3 years since collected in Febuary when I finally put it into it's oversize bonsai pot:
http://forum.bonsaitalk.com/showthread.php?t=13091
The lower branches have all grown since collection, and will take at another 2-3 year to fully thinken and develop. The top is still thicck, because I am growing out a few more branches in the front.
I was taught on this forum that Japanese boxwood can be much fater grower if you aggressively feed it, and this one has cerainly proved the case.
Anyway, you need to set realistic timelines for both your trees when you collect them. 5 years from ground to show ready is realistic if everything goes well.