Originally Posted by csutter

You can tell by the missing B seat in the first row - which would be available on aircraft with any of the new seats

The reason for this is that in CE, the B seat is compressed (making A and C wider) whereas on the other side all seats (D, E and F) are expanded. They have to leave the ABC side compressed in the first row of ET behind the curtain to avoid carts coming through the curtain bumping into the knees of the poor person sat in the C seat.