Mate 30 pro had quad-cameras while the Vanilla Mate 30 had three cameras apart from a laser autofocus sensor.
Interestingly enough, reports say that the vanilla Mate 40 will retain the Yuba-style camera arrangement on the Mate 40.
The supposed mid-frame of Mate 40, leaked on Weibo, shows camera cut-outs, in-display fingerprint sensor placement, speakers and more.
This is because, despite sporting the same naming, the Mate 30 and Pro comes with slight differences in display with the vanilla Mate 30 having a strangely larger 6.62-inch albeit being a flat display.
Similarly, a recently leaked spec sheet of the Mate 40 series hints that the Mate 40 and Pro will have three and four sensors respectively.