I'm not sure what you mean by "use" it - do you mean to enhance the cedariness of your humidors? In that case I don't think it makes a difference which one you use it in.
I like to split off pieces of it to use for cedar spills for lighting. I also use the little sheets of cedar that come in the bottom of cigar boxes for that purpose. But I only do this outdoors - sometimes it tends to flare up and I don't want to send the proprietor of a cigar lounge running for the fire extinguisher