If you want to look at loading in terms of how the rubber hits the road, you need to look at cell impedance. This will tell you much voltage sag you'll get under load.
The C rating indicates the maximum load, but the cell impedance indicates the efficiency in delivering the load. So, for example, the 1400mAh LiPo flat cells I use have about 25 mOhms internal impedance. With a 10A load, they sag around 0.25V. An AW IMR 18650 has around 35 mOhms. It will sag around 0.35V with a 10A load. The CGR18650CH has around 50 mOhms, it will sag around a half volt with a 10A load. This is still lower than a protected ICR 18650. Those have around 80 mOhms.
Most boosters are good with 50 mOhms cell impedance so a CGR18650CH should be no problem. My own mods can't go higher than about 30 mOhms, but only because they have a high output limit of 30 Watts. If I dropped the max output down a few Watts, a CGR18650CH would be fine.