shape
carat
color
clarity

Which diamond is "better" ?

I would always take an AGS0 over a GIA 3x if have the opportunity. Also, Whiteflash has an incredible upgrade policy - even if you have no intention of wanting to do an upgrade now, you never know what the future will bring.
 
Ditto @headlight’s comments. Also, with the BN diamond, you hope it’s a good performer; with the WF diamond, you’ll know it is.
 
The Whiteflash stone all day - beautiful choice!
 
Whiteflash
 
Definitely the Whiteflash. I am still in the midst of searching for a diamond of my own but I've found that James Allen and Blue Nile have an exorbitant amount of under-performing diamonds at premium prices.
 
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