I have a mini:
And it will chop things into smaller pieces but not really grind them. The immersion blender will puree them into a paste. It has the advantage that you can move it up and down through whatever you are processing. It does better if there is liquid involved so it’s not good at chopping. I’m not sure what texture your final product needs to be. If I had to use my immersion blender on mealworms or crickets I’m sure it can get them to a nice hummus consistency (with the addition of some liquid) 
The cuisinart I mentioned above has a 200 watt motor. There are much larger and stronger commercial models also.
