>>722907618 (OP)
It depends on the sex game. In games that give you deeper interactivity like being able to click on tits for example, it effectively gives you a stronger fulfillment because you're fulfilling more of your 5 senses. By watching porn, it's just sight and hearing, but through porn games, you could also be fulfilling the sensation of touch. The agency of sex games can also give you more immersion, because instead of watching someone else have sex with someone, you're in control of the person having sex with them, which in a way makes you feel like you're the one having sex here.