Yes, the temp chosen will give the steak the look of a steak that is rare, medium, or well done although the meat will be cooked through in all cases if it is in the bath for the correct time. The longer the time the more tender the steak will be within reason. Meaning you can't SV a rib steak for 1-2 days and expect the texture to be good although since flank steak is on the tough side you can. That's my 2 cents;)