essentially the same. IMHO, pinch point would relate more to drastic geographic features such as cliffs, water-lakes, ponds, rivers.etc,- Funnels tend to be the narrowing of woods/cover from one travel area to the next. Both funnels and pinch points serve as tools to narrow travel of the deer to a more finite path.

Just a tip: don't fall into the trap of getting caught-up in terminology.