Bob, make sure you empty the firepot on your MAK every time with those. With LJ using bark, they are very ashy. I had a flameout on my MAK 13 hours into a brisket with them. Started with a clean pot and after 13 hours it was 1/2 to 2/3rds full of ash.
The Kingsford are also 100% hickory. Not sure on whether they use bark, but guessing they do as there’s plenty of ash with them as well. In the end, both should produce identical results.
CookinPellets also makes 100% Hickory, but they don’t use bark.