John and George bought their models in 1966 and used it a lot from then on, until the end of the Beatles. The difference between the two is that George's had a Bigsy vibrato. Both George and John removed the beautiful sunburst finish. John's guitar is currently at display on the John Lennon Museum in Tokyo, while George's is still among the other guitars of his collection.
It's worth mentioning that the Cassinos probably deserve the title of the "Beatles favourite guitar". It's the only model that never got totally out of scene. Paul's is still his main guitar to this day; George's was still kindly shown by him in a late 80s interview, while John's was possibly the only beatle guitar he continued to use in the solo years, being the guitar he played on "Imagine", for example, as can be seen on numerous films about the album. He also used it in the Beatles as far as in the Get Back sessions.
