How to tell if my body needs high carbs diet or low carb diet for cutting?

29 years, 5'9, 172lb, 14% BF
Weight training 5x week with cardio 3x week

I want to get more lean and maintain muscle definition. I am currently trying out a taking in about 100-120 grams of carbs a day (mostly complex). I've read a lot about how some people require more carbs to diet than others but how do you really know what should I be looking out for. I would hate to mess up.