Both are pretty comparable knives in size and materials (no surprise there, it's the same manufacturer) - it looks like the main difference here is in the blade shape. Do you want a more pronounced point? If so, get the DPX. The Lionsteel looks like it would be the better slicer with the full flat grind, though.
I'd probably go with the Lionsteel, since I don't tend to stab things nearly as often as I would like a clean and controlled cut like I would get out of a full flat grind.