I think.what might irk or irritate Gravano regarding Franzese is this
Franzese knows how to make $$$$$.no matter being in the life or retired from the life and has a better business acumen than Sammy.
Who.took a more intelligent path after walking away from the mob?
Franzese easily.
Franzese is making more savy business decisions than the Bull.
Whats Sammy going to sell after he runs out of tales to tell?

Does it really matter in the big scheme of things that these guys both
Did what they had to.do to preserve their existance?
Since honor and loyalty is really a myth when you really break it down
In the context of LCN, then to be critical of these 2 for "betraying"
Their LCN compadres means you actually believe omerta is 100%
Real and honest.

Heres something to ponder
If a "rat" or "snitch" killed another rat or snitch, how does he look
Through the eyes of a LCN soldier or boss???