I can try to answer this one a bit, and then pose a question for moose/toooj as well.
First off, because the BK16 is un-released, there have yet to be comparisons between the two (at least public ones). The MK1 is also relatively new (and relatively less well known than say, the Short USMC).
The BK16 will likely be a very tough little knife, but it is also not nearly as thick as its larger brother. The MK1 and the BK16 should have the same blade thickness, but the MK1 will likely have the lead when it comes to "slicey" type things. The BK16 is a bit shorter, and a full width full length tang, so it will likely be a bit "tougher" for battoning and things like that. However, keep in mind the blade on that is just over 4in, so its not really a large knife at all, and will not excel at large knife tasks like the BK2. It should perform just fine, but the BK2 is effectively a wedge because it is so thick, and the BK16 will be thin in comparison.
Hi
Also, stick tangs don't mean "fragile either. Moose used one of his USMC's for three years splitting wood for his wood burning stove. He wore off ALL of the coating by use alone before the knife broke. Sure a BK2 or BK7 would have likely lasted longer, but stick tangs are plenty strong for most things, especially on smaller knives. The MK1 should be plenty strong, but if you are worried about it, then I would go with the Becker.
In the USMC, the Kraton version actually has a slightly thicker stick tang (.71in vs .59in or something like that), and I've been wondering if that is the case on the MK1 as well. If that is true and you're worried about strength, then I would buy that version.
But by all means, if you can go ahead and buy both of them, we would LOVE to see a comparison review between them

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Good luck

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