ISTps are far more coscentious about school work and stuff than ESTp. ISTps have a lot less need to expend their energy than ESTps: you can even notice this when sitting at class, you can see that the ESTp gets uneasy with too much sitting and he'll be moving his legs, hands, everything, whereas the ISTp is generally calmer. ISTp talk slowly than ESTp, they also tend to "look around" much less. They don't start giving grades to every girl they see, generally. ISTps are more precise: when they work they usually take longer than an ESTp but their work is more likely to be correct. ESTps don't tend to like to spend their type with the kind of people that...go around, shopping, and generally "relax"...they tend to feel the need for excitement and umm, can't really explain.

ESTp is much more likely to dislike a lot of people and be uber critical of them and thereby tactless, whereas the ISTp is much more accepting.