Houseki no Kuni (TV), Shoujo Shuumatsu Ryokou Recommendations
These two are NOT similar. However if you like one then you will probably like the other, they have some parallel points in enjoyment; the atmospheric and half-minimalistic tone, light social commentary, professionally crafted and unanimelike shots and carefully constructed, immersive dialogue. Both look good too. If SSR is Slowdive, HnK is Sigur Ros.
They both feature settings of similar feelings. Houseki no Kuni has a much larger cast and different intentions, but if you enjoy worlds that exist far after the decline of humanity, that's a strong similarity. They're both mysterious and leave a lot of questions unanswered for a long time.
If you enjoy one, you'll likely enjoy the other.