Both are audio interfaces, $3499 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 Lynx Aurora(n) reaches 100 dB on 567 of the 567 models here, the RME Fireface UFX II on 564.
| Specification | Lynx Aurora(n) | RME Fireface UFX II |
|---|---|---|
| Power into 32Ω | 1.3 W | 200 mW |
| Power into 150Ω | 277 mW | 43 mW |
| Power into 300Ω | 138 mW | 21 mW |
| Power into 600Ω | 69 mW | 11 mW |
| Output impedance | not published | 2 Ω |
| Output noise | not published | not published |
| Price | $3499 | $2799 |
| Headphones it reaches 100 dB on out of 567 | 567 | 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.
3 headphones reach 100 dB on the Lynx Aurora(n) but not on the RME Fireface UFX II — Moondrop PARA, Symphonium Crimson, Symphonium Titan.
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: Lynx Aurora(n) and RME Fireface UFX II. Or put either against your own headphones in the source comparison tool.