is gdp and purp. urkle the same thing?

i am wondering, i was looking at subs deep purple strain and while i was drewling i thought to myself that it looked exactly i mean to a tee exactly like the gheeks gdp i grew out about a year and a half ago. i have also read some articles in different rags that say alot of the west coast purple cuttings are the same just renamed? thanks for your thoughts guys and gals cuz i got a TON of og kush x gdp seeds i am thinking of going through now to see if i can pull some of these straight ladies out of it and bring it back. plus i got the double grapes going that seem to be the same as deep purple but with a different daddy of the same genetics. it was a true soggers dream plant fat huge buds 18 inches in height and no gaps or runs of stem to be seen. thanks again!
peace pot and microdot
sam_i_am