Dishonored 2 is on sale

I'm scraping money to lose for the current steam sale, but I need to ask if its worth it to buy dishonored 2

If I see some good reasons, I'm making sure to buy it

I wanna ask if its a better dishonored or is it a different game entirely (I have heard of 2 diff protags, but thats it really)

One more thing

NO SPOILERS!! I HAVENT WATCHED ANYTHING DISHONORED 2 YET SO PLEASE

Thanks!