I think I'd do neither. I don't want a full length window in my garage.

And are you 10000000% sure that the garage and the house will have the SAME final floor elevation as shown in the drawing? Usually there are steps into the house from the garage that leads to a higher ceiling in the garage than the house. If you want NO STEPS into the house, you have to plan it, call it out in the construction documents and validate it at every step - from excavation to the foundation pour.

I would not go with such large windows in the garage. I like to provide a greater degree of security, privacy, and storage space in a garage; but that's me without knowing the program.

Neither. There is slready too many discordant clashing things going on with this exterior elevation. It needs a lot of paring down, and fenestration unification. Less is more.

I would go with the smaller windows myself. You can barely tell that they are smaller. I wouldn't have noticed if you didn't say that.

I can’t even tell the difference, but would never have those windows on a garage.

Maybe someone else has had an ok experience with that though, but I’m not sure just an anecdotal “ I’ve never had a security problem “ is enough. I guess you could say all first- floor house windows have same issues, but it somehow feels different. Partly because, you NEED good natural light in house, but can forego in garage, and there can use industrial ceiling LED tubes & such.

Slightly off topic, to me it feels like the gable windows are overly large for a fake half story; unless I am missing something since it is difficult to judge without floor plans and the other elevations. I could be wrong, but I doubt it.

And this is rough, but maybe consider a full width porch and larger gable at a lower pitch, and using the same pitch over the garage. I've raised the porch roof slightly, and extended the roof to the right.

I think the windows look too big on the house and the garage. Like a dollhouse where the house and door and the little windows are one scale, but the tall windows came from a kit the next scale size larger.

All this great information and you just wanted to know 'A' or 'B'.

If the point is to integrate the garage seamlessly into the house, the larger windows work better.

If disguise is not the intent, more distinction would be advised.

Below is a nearby property.

I don't believe our Code would even allow the same floor elevation of the garage and house. Ignoring, for the moment the 2% slope required for proper drainage.

Thanks, everyone!

The first would be my choice if you raised the bottom of the windows to match the house window to the left of the garage. The tops already match that window.