Full priced games sell well on PC too, for example The Witcher series biggest platform still is the PC. GTA series OTOH is not very suitable to PC, as it contains arcade driving parts, and the standard PC interface, mouse+keyboard, totally sucks for driving, OTOH a console controller is a good compromise as a standard controller suitable to games like GTA without requiring to purchase another controller. Just like RTS', but also RPGs with a party, not a single player character, mostly suck without a mouse. Neither the former, nor the latter are suitable to devise a general rule about how games sell on PC or consoles respectively, as htey are designed ti fit better the standard interface of just one of them.