Between those 2 I would go with the 404 Jeffery.
I think Hornady will be loading it soon.

However as a "Rule Beater" take a look at the 416 Rem Mag.

Brass and bullets are much easier to get, as is factory ammo.

However, If I had a 416 Rem Mag, and I did before I got my doubles, I would just load it to 404 Jeffery specks.

However I must disclose that I have a 400H&H bbl ordered for my Blaser R 93.