When stating to build, I purchased sugar maple blanks from Freddie Harrison at pretty high prices, so then went to Dunlaps and bought red maple blanks in various grades and these were quite hard. Had no problems carving the red maple and irregardless of the wood type, chisels have to be sharp.
Yes..original BC LRs are incised carved and through the years the carving has "washed out" to varying degrees....so my BCs are all relief carved......Fred