That's tough to answer.
I have neither a Ferndown or a Castello.
I have four pipes that are roughly equal in quality.
First: My Ascorti New Line carved by Pepino Ascorti. (by the tobacco jar)
I was offered a grand cash for it... I couldn't sell. Tinder Box had it replicated and as I remember they sold for about $200 in the early 80's. My Ascorti and my Cavicchi Volcano are on par with each other. (second from the right front)
Then are my Texas made pipes the TRG White Ringed Volcano (first on the front right), a gift from some friends. One of Tim George's first pipes.
Lastly: My other Texas pipe made by Mark Tinsky "American Calabash"... beautiful grain. (top left, below)