Weight, material, and name brand. Woodman is a UK brand and probably has less of a market share than Thompson. Thompson probably has a better name recognition and more market share. The can charge more.

@lostarchitect - 1mis·use verb \-ˈyüz\
Definition of MISUSE

transitive verb
1
: to use incorrectly : misapply <misused his talents>
2
: abuse, mistreat <misused his servants>

I may have abused the sentence, but I did not use the word incorrectly.