I got confused with your "shorter" and "longer" terms, because the Large Trapper obviously has a "longer" blade than the Mini Trapper.
But then I figured out that you meant the Large Trapper has a "broader" or "wider" blade than the Mini Trapper. And I agree, I like a broader Clip Blade better too.
They used to use a broader Clip blade on the Mini Trapper frame, but it was called a Dogleg Jack (top knife) and had a small Pen blade secondary with the nick on the opposite pile side....
But when they went to the Mini Trapper model with the full-length Spey blade secondary, they trimmed down the Clip blade so you could access the nick on the Spey blade on the same Mark side of the knife...

There's your answer, unless I completely misunderstood your question.