B-R didn’t have his McGuire numbers, but his numbers with Vazquez and Plawecki are more similar than ERA suggests.
His K/BB, for example, was 3.06 with KP and 3.20 with CV.
His BAA, OBPA and SLGA were all worse with KP, but in each case by roughly the same amount as his BABIPA. Not sure how much a catcher can influence BABIP…