They’re two totally different windows. If you are wanting something that looks a bit more wood-like, the Andersen 100 is the better choice. If you are wanting something a bit more industrial, with more glass and less frame, the Milgard aluminum fits the bill. Personally, I really like the Andersen 100 casement and have had very few issues when we’ve installed them. I’m not a big fan of Milgard’s aluminum, but it gaining market share due to it being one of the few options for black.

I have Milgard Tuscany series casements, one on either side of a picture window. The minute they were installed, I open both casements all the way. I am in Southern California, so open windows for evening breezes are key to enjoying them. What do you know, when I tried to leave the house a couple hours later, the windows would not close. I had to leave them open for a few days until someone was able to come out and look at them. Milgard sent someone who “fixed” them by preventing them from opening a full 90°. They know each only open 80°. I tried to complain about this, but was difficult to get any kind of response and they seemed to be trying to kick the can back to the dealer. It is four years later and I still have these casement windows, but specifically two provide air into the house that do not even open all the way. I regret it daily and wish I had just gone with a double slider.

I have a 1956 MCM ranch with those great overhangs and we installed HD ( I have no idea of brand ) patio doors they are vinyl and have stood up very well in S. B.C. Canada in all the different weather we get. They were quite affordable we got triple glazed since they are quite large and we get very hot and very cold weather and also live up above a highway.Our doors are 96” wide and the same height as you have. You of course have all the rules in CA you need to follow so not sure mine would meet those criteria Those nice big overhangs are IMO awesome for controlling heat in the summer and where we live the sun heats the house in the winter so a great design. We do have one large window facing west that does let in heat and UV we have solar shades on that window and makes a huge differencr in the anmount of heat from that window, I think if I was to change all my windows I would go black metal with the skinniest frame possible like commercial ones.

Hello! Update: WIndows/Doors Choice is now between: (A) Milgard thermally improved A250 aluminum 16 windows - mixed casements and sliders, 3 sliding patio doors 96" X 82" and 1 sliding patio door 72" X 82". Quote for those installed is $44,000. or B) Milgard Ultra C650 fiberglass 16 windows - mixed casements and sliders, same size and number doors. Quote for those installed is $65,800. My understanding is choice (A) the fiberglass windows and doors will comply with Title 24 for my Bay Area home. But as they are $20K more, with fatter sightlines, we are considering hiring a company to provide us with "as built drawings" (floor plans) for our home, and we then hire a Title 24 consultant. My home will then be evaluated for energy efficiency and given a number. By undertaking other energy saving measures (new furnace, R38 insulation instead of more basic, and other measures I know not of, but hope to learn) we can make up the difference for the U value of 0.38 for Milgard thermally improved aluminum, which just misses the 0.30 of Title 24. Milgard standard aluminum has a U value 0.45. Has anyone else gone the energy survey route with a good result? Are these facts correct? Are these quotes fair for the Bay Area? This second contractor is also installing Hardie Board as I noted in my OP. (The first contractor failed to get back to us in time, and so here we are months later. Marvin still not an option, as he's not a certified installer and we'd have to buy them outright.) We are trying to move fast to avoid yet another price increase. Thanks. Should I start a new thread as Sierra Pacific is no longer in the running?