I felt dishonored offered many more options to move around, the level design had more surprises and verticality which multiplies options. Sneaking is a viable gameplay approach which I love (personal taste here). The characters and dialogs have a lot more depth and there is a lot more lore to discover along the way.

Also It might be my fault because I opted to avoid typhoon upgrades, but the mid game was really tedious due to ammo scarcity and the end game was too easy after that.