Both are audio interfaces, $2790 against $2799. This page puts them side by side on the only three things a maker can be held to — power, output impedance and noise — and then asks the question that actually matters: which headphones do they treat differently?
The Merging Anubis reaches 100 dB on 566 of the 567 models here, the RME Fireface UFX II on 564.
| Specification | Merging Anubis | RME Fireface UFX II |
|---|---|---|
| Power into 32Ω | 961 mW | 200 mW |
| Power into 150Ω | 205 mW | 43 mW |
| Power into 300Ω | 103 mW | 21 mW |
| Power into 600Ω | 51 mW | 11 mW |
| Output impedance | 0.035 Ω | 2 Ω |
| Output noise | not published | not published |
| Price | $2790 | $2799 |
| Headphones it reaches 100 dB on out of 567 | 566 | 564 |
A figure marked not published is missing from the maker’s own material, which is not the same as being good or bad. Where one of these two publishes a number and the other does not, the comparison on that axis cannot be made at all — and saying so is more useful than guessing.
2 headphones reach 100 dB on the Merging Anubis but not on the RME Fireface UFX II — Moondrop PARA, Symphonium Crimson.
89 headphones are left alone by the Merging Anubis under the one-eighth rule but coloured by the RME Fireface UFX II (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 86 more).
564 of the 567 models here reach 100 dB on both. That is a power count and nothing more; whether either source suits a given headphone also depends on the two lines above.
Each has a page of its own with every power figure traced to what the maker published and a full headphone list: Merging Anubis and RME Fireface UFX II. Or put either against your own headphones in the source comparison tool.