Are these two different birds? Pictures taken 5 days apart and 2 miles apart?
Central tail feathers are longer on Bird No.2, they are even and squared-off on Bird No.1.
The lores and super on No.2 are darker and it extends further back above the eye than on bird No.1. Which are extensively white blending into cream.
The lower mandible on Bird No.2 is darker than Bird No.1.
I believe that we probably have two birds here in Ottawa.