Per the Kitchn, Spearmint has a sharper flavor and more intense aroma, while peppermint tends to be more delicate and sweet. Peppermint also contains the chemical menthol. This chemical affects the nerve endings in our mouths and makes our brains think the mouth is cooler than it really is.
cat and mouse (uncountable) (idiomatic) A relationship in which two parties closely monitor and challenge one another in a suspicious or self-protective manner, often because each party is attempting to gain an advantage over the other. The Allied and the enemy submarine played a game of cat and mouse, checking up on each other's whereabouts and strategies. The hackers played a cat and mouse game with the system administrators: the hackers kept trying new tricks, and the system administrators kept mounting electronic defenses.
The laser mouse is a hardware device with latest technology whereas optical mouse is a relatively old technology. In terms of normal people, both the mice have light underneath them but one has LED and other has infrared laser distinguishing it from each other.