Just a brief outline of the rock that I scouted from different location and shortlisted the below 2:
Option 1
0.59|D|VVS2 @~$5900
Option 2
0.66|D|VS2 @~$4900
※ The prices I posted include an approximation of the setting price.(but I used this upperlimit price to compare to BlueNile section anyway)
Below are some of the consideration factors, which make me stuck at this crossroad:
【Wearer Info】
She normally do not wear any jewellery and knows nothing about diamond apart from price + carat (the more expensive & bigger, the better?

).
Among her peers, she is the first few to get hitch(ed in time to come) therefore not much people in her group comparing such stuff yet.
【Purchaser Info aka me】
My budget is around the range of 5k~6k thus getting option 1 will still be within my budget, especially the VVS2 stat attracted me alot. But is prompting from VS2 to VVS2 worth it?
I am strongly intending to get a pair of branded wedding band e.g. Tiffany & Co; Cartier; Bulgari etc so the saving from option 2 may come in handy.
【Comparison to BlueNile】
Using similar stats from BlueNile diamond listing. It seem like option 2 is priced more reasonable/closer to BlueNile pricing, comparing ot option 1.
Option 1 jackup by ~60%
Option 2 jackup by ~30%
I would very much appreciate any guidance or advice you guys can give.
Thanks in advance.