Roa is stated to be the strongest vampire and Dead Apostle, which puts him above Crimson Moon, who is considered both and rated as 1-C with immeasurable speed. Roa has a lot of knowledge on vampires, so his statement isn't empty and is backed up by him beating someone who scales to Crimson Moon (Altrouge), along with her beast Primate Murder that has been compared to Crimson Moon before. he also stole Arcueid's power for himself, who is stated to rival Crimson Moon in scale and existence and killed all of the True Ancestors except one. so basically he has statements scaling him above Crimson Moon and feats to back it up.
Crimson Moon's profile is here.
Brunestud of the Crimson Moon (朱あかい月つきのブリュンスタッド, Akai Tsuki no Buryunsutaddo?), also called Crimson Moon, is the Ultimate One of the Moon and the Third of the Twenty-Seven Dead Apostle Ancestors. He was the first Ultimate One to answer the call of Gaia, and in exchange for the creation of a...
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ORT/Type-Mercury's AP is just getting adjusted to say that he should be comparable to other Types, as opposed to specifically saying he is stronger than Archetype-Earth, which is never stated anywhere or even implied in any source material and is basically fanfiction. but his tier stays the same.