OK so you're paying a LOT of money for this and neither option is that well cut.
Are you absolutely set on working with this broker? They don't really seem to be looking out for you in this transaction (which would annoy me were I the one paying).
Please go to Whiteflash and get that D IF that rockysalamander posted instead - once you've set the FL, it'll be IF anyway and the WF one will be sparkly AF which is mostly the point of a diamond. I assume from your comment above that you're looking to spend around $200k, at least with WF you'd have a super ideal, a great upgrade policy and some change from the $200k too.
No, I am not set on working with this broker. And I agree with your sentiments regarding Diamond 2 (Diamond 1 is still to be determined based on ASET and IS images) and the broker.
Another item I should disclose - this diamond is for a single earring, for myself (male).
I will contact Whiteflash as they have received a lot of positive recommendations by forum members.