Right now I lean toward first pair. Second one seemed better initially, because it's lauder, but it's also boomy therefore more fatiguing. What's worse I've discovered it has more forward mids and a little harsh highs. I had to take them off after 30 minutes or significantly reduce volume. First pair is much more musical and relaxing to my ears. It appears less engaging when doing A-B tests, but if I listen to them solely for a few hours I no longer have this impression. Too bad these pair has cosmetic defect (indentation in a leather headband). Probaby I'll try to arrange one more replacement.
Also clamping in first pair is super strong and super loose in the second pair haha Oh well.... sennheiser china facilities QC sucks... I would've gladly paid 20$ more for product with "made in germany" sticker.
I'll sell you a "made in Germany" sticker for $20. Pm me your details