It all depends on your chest and shoulders. I have to go with the slim fit because, while ESF fit me in the waist, it is too tight in the chest and shoulders. FWIW, I wear a 16/34 in the slim fit and am 6'2 and 190 pounds. Also, the BB stores keep try-on shirts in every fit and size so you can see if the ESF works for you. If your SA did not suggest this, you should go back and ask to try on the ESF in your size.