The diamond look of the WF looks nice based on  the actual diamond image. You may think that the H&A of WF looks better probably because it is cleaner while JA's one shows some inclusions (crystal on the H&A). Actually, in terms of H&A accuracy, JA's H&A looks better. WF's gap between heart and the arrow 5 o'clock and 7 o'clock positions seem to be wider than the rest. Also, the heart at 1 o'clock is also bending at the tip. However, the WF wins in terms of IdealScope slightly, but JA's one should win in terms of fire, thanks to the 35 crown angle.

I will skip the G SI1 beacuse I don't like the inclusion that is obvious on it. I have not seen the video for the WF ACA 0.71 G VS2 because I am in office now, so abit inconvenient, I would suggest you to compare WF ACA 0.71 G VS2 video against the 0.70 F VS2 video, and see which one  captures your attention more.

For now, my ranking will be:
1. 0.7 F VS2 (WF Premium Select)

If based on IdealScope:
2. 0.703 G VS2 (WF ACA)

If based on H&A:
2. 0.71 G VS2 (JamesAllen. Sure hope they can provide ASET as well to see if there are any "greens").

p.s. I will check the videos later. And no, you can't use Enchanted Cut Score for AGS cert. It only applies to GIA cert.

Update: Although 0.703 G VS2 seems to has a cooler appearance, after looking at the videos, I still prefer the 0.7 F VS2. . The sparks seem to be bolder.

yes yes yes
they will happily throw that in to your purchase if you ask

Just got my ring today. Seriously, JannPaul's workmanship really is awesome! They got every minute detail on the ring spot on. Couldn't ask for more.

The last they told me they no longer accept setting customisation for diamonds not from their outlet. But you can ask them and see lahh. If you are serious with it I can also help you ask.