I way prefer the wood for what it’s worth. I love weathered wood - it ages beautifully, lasts for years and years, and the environmental impact of cedar (assuming that’s what it is) is far lower than concrete too.
Concrete is the plastic of things that aren’t plastic. Produced mostly with fossil fuels, huge GHG associated with production, and will sit as a lump of trash forever-ish once the next person decides they prefer a different look.
Make your own decisions obviously - I’m aware that I’m particularly carbon footprint averse.
It’s more expensive than SPF, but I spring for cedar - I built my planter boxes, garden beds, and patio furniture out of it. No staining required, zilch upkeep. I built a 3m x 1M raised bed planter several years ago and it’s required zero upkeep so far. Ditto my patio set built five years ago.