My experience is there can be differences. I can't say specifically for Swiss Coffee, but have found I prefer Benjamin Moore's Navajo White to Sherwin Wm's.

Dunn-Edwards is a Southwest paint and very popular. It is a high-quality brand formulated for hot weather with their LEED certified factory located in Arizona and headquarters in Los Angeles, CA. Various quality level lines, with even the "lower" quality still being equal to many other brands mid-quality. Dunn-Edwards also does not advertise- strictly word of mouth. So you might not have heard of them if you're not directly in either the painting/building world or a designer/architect

yes, the gray tones are hard to work w/those tiles. I just had a complete reroof during the paint change. The entire neighborhood (I'm in North OC) has those heavy pink/terra cotta cement tiles. but they've faded after 40 years. I couldn't wait to get something diff. If you want to remain period to your home, stick w/the white/yellows for the stucco, and the greens/blues or even black for the trim. have you thought about doing black? It's very handsome this is a creamier white w/more of a dark bronze trim blue or green always works I did find one with a dark charcoal gray and a swiss coffee stucco. this color gray would work. You need a true gray with no blue or yellow undertones. this is a 1930's in Los Feliz I still like the black though i'm jelly of your home. vintage spanish are my favorites. I'd love to redo one. (you in the highland park/echo park/ lincoln hts area?)

we use Benjamin moore like the regal the aura. Kelley more is good for mid level jobs