It does seem a little odd. I can only presume that someone has forced their hand in some way in getting said traps on the 'list'....
but, if we are to take their words of:
a spring trap is equivalent in all relevant respects to a spring trap of a type and make specified in the Schedule if it corresponds to the spring trap so specified in construction, in materials, in impact force or momentum, and in all other respects which are relevant to its effect or manner of operation as a trap
Then I cannot see how Bridger, Duke and Bellisle of the 110 size can't be legal. They're all the same