The way i look at it i would have been disappointed to spend all that money knowing i had almost 100% chance of rippling, i measured the size implant with tape measure against my boob and the 340 measured to the very edge of my boob so think e was right and there isnt much difference in the two sizes. When e asked me on the day of op i said i dont know lol but pleased with his results. What size are u aiming for? Just let him decide its not worth the stress as there aint much difference its usually bigger in the width then the projection x