The traffic & DR are not something to fully rely on,
There's much more that makes the difference
Including from which page you're getting the link, the website & page OBL, the diffuculty of KWs ranking, niche relevancy, etc...
There are so many links farms used for selling & reselling links (supposevely guest posts) on websites ranking for high volume useless easy keywords,
Such website(s) linking to 100s or 1000s of other websites/pages including any type of BH niches & spammy ones just because you're willing to pay,
And many of them are actually just manipulating the DR/DA of the website(s) itself that gets a dozen of useful links at most,
You'll get much greater & longer results from a niche relevant PBN homepage link with 100+- RDs with decent link profile & very low OBL,
The same for a guest post from niche relevant geniune website(s) with decent link profile that's already ranking for some competitive keywords,
Just take everything into account, relying only on some numbers is a waste of money & will lead you to become an easy target for all of these scammers