Thanks! I am looking for actual Models with her frame.
But i think, she got bigger implants as she was skinny, and then she was on top, like here - the Implants look fuller, have nice rippling and got a bit saggy after a while.
https://xfantazy.com/video/5ff23aca5c0d0a18b19dbbdd
Here I think, the implants have been smaller here:
https://sexhd.pics/gallery/vivid/briana-banks/optimized-pornstar-metropolitan/
Maybe I should just give up. But I will try one last time.
Her smaller looking implants are AFTER she had been in the biz for a while, check out the release dates where her boobs were smaller, like Chatterbox (2002) or Last Girl Standing (2004). When she first got them done she was still billed as Mirage, like in Gag Factor 1 (2000) - you can see the scars look somewhat new - and those are the same size as when she did Up The Wahzoo 1 (2001) - this is the bigger size as in your first link.
So her boobs looked their biggest around 2000 then she lost weight sometime after 2001 and her breasts looked smaller. Many women lose considerable breast volume when losing weight, look at Ava Addams when she got implants because her big naturals shrank a lot when she lost weight.
Brianna just lost quite a bit of weight, like many girls seem to do after being in porn for a while. I can't say for sure what caused it, but in this industry it is typically substance abuse. I have seen zero evidence that her implants changed until she came back later in the decade with a breast lift.