hmm well in the suborder Sciuromorpha include chipmonk and ground squirrel and gopher (also woodchuck,beaver,prarie dog,tree squirrel, flying squirrel,kangaroo rat and springhare). so i think they is related but not the same thing. in genus spermophilus i only know 2 animals: spermophilus richardsonii (richardson ground squirrel) and spermophilus columbianus(columbian ground squirrel). gophers i think is less upright and have bald tails. chipmunks have longer and more fluffy tail and stripes. but the 13 lineed ground squirrel also have stripe so maybe that is what have you call streeky gophers? but yeah richardsons have many many different names its too confusing haha.