To truly feel the "grit" of the gut strings, lossless (FLAC) is usually better, but for casual listening on headphones, the MP3 still conveys the raw energy well. Verdict

Are you listening to the or one of the Operas (like Don Giovanni )? What kind of headphones or speakers are you using?

You might lose some of the "air" around the period instruments and the haunting decay of the recording space (often an old cathedral or studio in Perm).