Sitka  is grown in west coast Canada. The bearclaw figure interupts the straightness of grain. Some people think this is detrimental to the sound quality of the top , Others like the beauty of the figure, saying it has very little sound affect. Good vertical cut grain ( quartersawn) and tightness of grain ( lines per inch across the grain)  are more important for good soundboard response.
 Some of the bearclaw is diagonal short and wiggly, some straight across the grain, wider and longer. It changes a lot from side to side in the bookmatch as most bearclaw figure is not deep or consistent in the depth of the board.  some bookmatching does happen ! Mainly AAA grade