By a gallon of each and try them out.

Or at least buy a sampler pint of each, and brush out on both the sunny side and the shaded side of the house to evaluate in sunlight and shade.

We have samples of these on our house right now. Alabaster is in the left and White Dove is on The right (all under the right window). The paint swatches look similar but IMO they cool completely different when painted. Alabaster looks more like a true white and White Dove has more of a creamy undertone. I preferred White Dove when the sun was directly on the house but when I went back throughout the day, I definitely liked Alabaster the best.

My recommendation would be to get samples of both and paint large samples to be able to compare.

Hi sam i wonder what you ended up choosing snd whether you are pleased with it. under the right window ypu said slabaster was on the left and white dove was on the right but there are three colors under right window and the one in the middle looks more yellow so if alabaster is on the left and white dove on the right, i wonder whats on the far right. thsnk you

I don’t remember the colors in the photo but we ended up going with SW Snowbound. It is pretty bright! In hindsight I wish we had gone with Alabaster as I think it looks less ‘creamy’ on an exterior compared to an interior. I didn’t want a creamy white at the time.