Funny… the perspective – or is it Photoshop? – makes them look nearly the same size.
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If it’s a Maine Coon and a very young mountain lion, I suppose no Photoshop would be necessary.
Diner and dinner.
Coons’ are big, but there’s a lot of fur there and none on the lion. And volume & weight go up as the cube of the size of an animal.
The deck appears to be a step lower than the interior floor. That and perspective, I think is all there is to it.