Sports bras

I ordered here new sports bras from Victoria’s Secret because my breasts have started to grow already and the two I have no longer fit. I bordered one 40DD (close to my current size but slightly bigger) and then two 38DDD. Guys... I tried them on and I just have to say I’m almost certain they fit exactly the same 😂😂 I figured after I tried on the DD that the DDD would be enormous but they both fit enough to wear but still have room for more growth. Do you think this is because they’re sports bras and less likely to show off as much as a normal bra?