PS. The collages are: a rendering of the interior view, a sketch of the exterior view (to scale) and Then a few screen shots of some inspiration..

For the interior view I voted A.

B makes your hallway , I think, too busy

But for the exterior view, well, you have some totally different inspiration pictures. Hard to tell which suits your house best.

Don’t know about the exterior, but I think the second interior looks better. The windows are more consistent. In the first rendering, the windows look disjointed and unbalanced .

I like A internally better.

For me in the interior in B the windows are out of proportion to the space, they sort of overwhelm it.

The exteriors and interior don't seem to match.

Thank You everyone! To give more context. Our existing house is a 4 level split:

Here is a sketch of the house with the addition sketched in as well(but the ‘addition’ was not to scale so I drew in red to give you a better idea of the addition size:

Here is a sketch of the house with the addition in red: