Energized Protodermis vs Echidna (Re:Zero): who would win?

Energized Protodermis favored — Slight edge (~55%)

Energized Protodermis · Bionicle · Base

Tier

6-C, up to HIGH 5-A

Attack Potency

Island Level, up to Brown Dwarf Level

Speed

Massively Hypersonic+, up to Relativistic

Durability

Unknown

Echidna (Re:Zero) · Re:Zero kara Hajimeru Isekai Seikatsu · Base

Tier

6-C, up to 6-B

Attack Potency

Island Level, up to Country Level

Speed

Supersonic, up to Ftl

Durability

Human Level, up to Island Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.