The differences are different ingredients, different tastes, and different packaging. 1. Different ingredients: The ingredients of the three compressed biscuits are slightly different to adapt to different combat environments and needs.

2. Different tastes: The tastes of the three compressed biscuits are also slightly different, and some people prefer a certain taste.

3. Different packaging: The packaging of the three compressed biscuits is also different, some are canned and some are packed in bags.