Hi MTHall,
While I don't have an 0200 and a 15, I do own a 0350 and a mini-15. The mini-15 is going to have the exact same blade, liner, locking liner and handle thickness as the full size 15. It is essentially the same knife, just scaled down in length. The 0200 however is going to have a thicker blade and handles, but the same liner and locking liner width as the 0350.
Im going to re-direct you to this post that compares the
0200 to the
0350 (with pictures!) so you can get a better idea of the size difference:
http://www.bladeforums.com/forums/showthread.php/950294-ZT-0350-vs-ZT-0200
For reference i'll post a few comparisons of my mini-15 and 0350. I know its not exactly what your looking for and they're from a camera phone but hopefully these will be useful:
If memory and google serve me well, both the 15 and 0200 have the same steel 154CM so they are on par as far as steel performance. If you want to get nit picky, i'm going to say emerson's 154CM will be a bit softer by 1-2 RC. Keep in mind that all emerson knives will have a chisel ground secondary (cutting edge) bevel. The 15 models will have the emerson v-grind with the chiseled secondary bevel like this:
(reference:
http://www.emersonknives.com/ekKnifeAnatomy.php)
In my experience the chisel cutting edge is incredibly easy to sharpen and hones to a razors edge with very little effort. I would say as a generality that my emerson knives slice and cut better than any other folding knife I own with the same blade thickness. If you are going for EDC tasks and cutting/slicing ability, you would be hard pressed to beat the 15's blade. For brute strength and heavier chores, I would prefer the extra thickness and stoutness of the ZT 0200. Lockup on both knives should be similarly strong although the ZT will trade emerson's titanium liner for a slightly thicker stainless steel liner and thicker blade face. Keep in mind that proper lockface/liner geometry can be more important than thickness of components. Both being quality knives I would not expect this to be an issue. The ZT will be significantly heavier.
TL;DR - Both knives are excellent high end choices and I would expect similar performances out of both. It really depends on your personal tastes and what you plan on using the knife for. For EDC tasks, I would suggest the emerson, but if you prefer a beefier overbuilt tank of a knife than I would go with the ZT.
Good luck and congrats on whatever purchase you make!
~ CLE