Those newer cells should be fine. I've been using MN20-2x18650 (older 2200mAh AW versions) as my bread and butter setup for quite a while. The newer cells may have around about or close to 40% more energy and so will put out more current but they're also lower nominal voltage at 3.6 vs 3.7v of the smaller capacity cells so if you're concerned about them being overdriven, perhaps that may help a bit. My MN20 has over 30 hours on it and though the beam is a little more yellow with age, it's still quite very nice. I certainly don't notice yellow or brown deposits on the glass envelope as with some of my other older bulbs like my P90.
I hope someone else jumps in to give impressions or if you have time, you could wait for me to try the cells myself. I plan to have them in two to three weeks time and can test them on my old MN20 as well as a newer one to note runtime differences, tint and so on.