The new layout of the living room looks the same to George as to Marsha.
The new layout of the living room looks the same to George as Marsha.
The new layout of the living room looks the same to George as to Marsha.
The new layout of the living room looks the same to George as Marsha.
In this idiom, we need to make the parallelism clear by repeating the preposition "to." This is a complex idiom, so we always have to repeat the preposition to make the full structure clear: "the same to P as to Q."