Back from the dead, again. Don't read this very often.
Pesare states in an interview that he taught what he was taught by his instructors who he lists as Sonny Gascon as his original instructor. Yes Pesare received additional training in Escrima, Aikido, Judo and Tae Kwon Do obtaining BB rank in all AFTER hiis initial training with Gascon which he included in his adaptation of the art. Utilizing what he felt would work while eliminating things he did not.
Karazenpo was created by Gascon and Walter Godin while they were training in Kaju with John Leoning, another Kaju BB who was also receiving training in Choy Li Fut from Master Share Lew and while Godin was receiving training from Prof. Chow.
Godin and Gascon created various specific combinations, grab, knife, gun and club defenses along with specific katas from their combined kajukenbo, kung fu and kenpo training. The end result of their collaboration was what they called Karazenpo Go Shinjutsu which has specific techniques and principles.
Pesare took what he learned from Gascon and others, added and deleted as he saw fit for his version which was taught to Cerio.
Cerio also received additional training in karate, kung fu, jujitsu and Kenpo initially creating what he called Chinese Kenpo. This was the style taught to Villari who trained others in the art until 1980 when he created his version SKK.
The core of the original East Coast Chinese Kenpo was Karazenpo Go Shinjutsu along with added karate and Kenpo techniques Cerio had learned in his additional training.
Cerio then altered Chinese Kenpo to his version of Nick Cerio Kempo a completely different art.
Villari's SKK kept the core of Chinese Kenpo/Karazenpo up to Shodan where he then created everything else from that point from his own theories.
So long answer to a short question. the Kenpo Karate of Chow evolved to Sijo Emperado's Kajukenbo then to Karazenpo to Chinese Kenpo all different arts with a common link. The same styles no, but some similiarities in theory and execution yes. They all come from the same or similiar backgrounds of a mix of Kenpo, jujitsu, Kung Fu, Escrima, boxing, Karate etc.