In my experience, it is better to inject the pork butt than to brine it. Obviously, the penetration is deeper, and depending on the injection sauce used, adds more flavor. I favor injecting and using a really good rub.
SNPP w/ mods, Patio Master(30 years old), Kettle Grill, Copper Penny UDS, and Maverick 73 thermo.
Youth and enthusiasm are easily overcome by old age and treachery.