Depends on sensitivity and the individual speakers, that's why you can't go by wattage alone. So just stating an amp wins due to wattage is ridiculous, And yes, the Yamaha most likely does sound better because it's an integrated. Less concern about shielding, additional room to take the interfere from.the power supply into place and the budget to improve component quality since you don't have to spread the cost around. That's the whole reason people go to separates. Same money but it's specializing in one thing, not multiple. A receiver is a spork, separates are not. Integrated amps are not. That's another reason they fetch a premium in price. Just like the Yamaha is similar in price to an atmos 7.1 receiver.
And your emojis don't help the situation, just compound the situation and shows a level of immaturity.