My 3 cents - You can tell Gene was completely inspired by Paul Mc. The bass line for "Rock and Roll All Night", is clearly a McCartney inspired line. The same would go for "Nothing To Lose". Can Gene give it up on his own? Surely - The bass line to "Detroit Rock City" on the Alive II album is a crushing piece of bass work.
McCartney is easily the better bassist - Then again, who know what Gene can actually play out of his Dragon Warrior suit and stacked heels? Paul Stanley was the better songwriter in the band. That shows in their 80s solo works. All of that being written, there are few other bass players that I wanted to SEE growing up.