I own a mouse and I've handled a cricket, but do not have one. I think the largest difference between the two knives is the handle. The mouse has a rather thick handle (for the size of the knife) that is very comfortable in the hand. It also has some grooves over the opening hole, to add control and prevent slippage of the finger. Overall, when holding this knife I feel like I have a lot of control over it and it is also very comfortable. If I wanted to cut up cardboard or maybe whittle a stick, this knife would be comfortable throughout the job as well as up to the task.
The cricket on the other hand, seemed much less comfortable to me. It was a little hard to open at first due to its small size and because it was very thin. While I see that this thinness may be attractive to some people, I feel like it wouldn't be that comfortable to work with for a prolonged period of time. If you are just opening the occasional envelope or cutting the wrapping off of a package, this probably isn't much of a concern, but as a college student you may want the option of using this knife for a multitude of tasks instead of having to buy another knife for heavier use.
In terms of appearance, I think that either of these knives are a good choice for not scaring the sheeple away. I am currently in law school and I like to carry my mouse so as to not frighten people. If this is a major concern of yours, I think that the cricket is a little bit more "attractive" and less intimidating. But again, the mouse really shouldn't be scaring anyone either. The upswept blade adds blade length to the knife but leaves it with the appearance of being much shorter than it really is. My girlfriend who is not a knife fan even likes the mouse and has claimed it as her own.
To sum up, I think the mouse is more versatile and could handle tougher jobs, while the cricket is a little friendlier looking. Overall though, both are good options and I myself and thinking about getting a cricket (but that para-military seems to be calling my name a little louder).
Hope this helps!
-Alan