Oleoresin Capsicum is available in various concentrations, typically measured in Scoville Heat Units (SHU), which quantify the level of spiciness or heat in a pepper or pepper-derived product. The higher the SHU value, the greater the spiciness.
If you're worried about the difference in texture, you can turn your crushed red pepper flakes into powder. Simply place a good amount in your coffee or spice grinder and pulse.