The Streamlight has a max of 200 lumens, where the TK50 is 255 lumens on turbo.
I never saw the Streamlight in real life, but owning the TK50, I can safely say this light outthrows all other 250ish lumens lights I know of.
I think the TK50 wins the 'throw-battle' between these two lights.
Besides this, the TK50 runs on common D cells, both alkalines and rechargables. So getting spares is easy.