If it matters, according to their published ISO 4548-12 efficiency rating, the Ultra bests the Amsoil Ea oil filter line. Ultra 99+>20um vs 98.7@20um. Looking for ultimate efficiency either will work fine. That said, price and availability favor the Ultra.
As for who makes Amsoil Ea filters currently, while may find some exceptions most posted here are made by Champ(fram). Look very similar to RP filters, made by same.