"the new bike has the exact same stack as the previous one. Reach, with a 90mm stem, is 8mm longer and I felt cramped. I switched to a 110mm stem and compensating with one less spacer, so the reach is 30mm longer than the older bike. While it felt way better on day rides, after the second day on road it felt too long."
With either stem installed the way you have it set up, the saddle height to stem height difference is the same as the old bike?