The difference is that you see it. As somebody that had rescued a mouse from a glue trap once, I find them nasty. Having a totally restrained animal dying from hunger in your kitchen over the course of hours and days while looking at you terrified is a really unpleasant experience.
You can kill it of course, and I'm not against killing an animal, but is a mess of glue and liquids and spring traps are more fair in that sense.
[1] After a while I just couldn't keep typing without doing something about it. Some people laughed at me, and a bald and almost naked mouse was released some weeks later into a dry stone wall when fur started to grow again. It was a lot of work but I don't regret anything.
You can kill it of course, and I'm not against killing an animal, but is a mess of glue and liquids and spring traps are more fair in that sense.
[1] After a while I just couldn't keep typing without doing something about it. Some people laughed at me, and a bald and almost naked mouse was released some weeks later into a dry stone wall when fur started to grow again. It was a lot of work but I don't regret anything.