They might make them a bit warmer, but it is hard to say for sure because they were already a bit warm to my tastes in stock sound. I have used the EQ app on these from day one (Clear Bass up to +4, and the two right most sliders up 3/4 of the way). The great thing about the EQ (like a lot of TWS that have a dedicated app) is that whatever EQ you give it, is stored in memory and even if you use them on a different device without the app installed at all, it will still have this EQ. I don't really think of it as EQ, more like re-tuning them to your tastes (or EQing the onboard DAC directly).
I'm actually STILL in shock that something with only SBC, and AAC can sound so good (comparatively). I would have never pulled the trigger if they didn't have the features I was looking for (permanent hear-through mode). In hindsight, I would have missed out on some truly good sound for TWS IMHO.