I must say I haven't notice it, but I did feel the stroller as a whole could be sturdier. Which is, I guess, a bit of a price to pay for that incredibly low weight for the size and type.
Personally, the Mios is my go-to. Very small but thanks to multiple bars on the frame, it is sturdy actually, and very nice to push. I used it with the carrycot as well as the seat and was very happy about the performance, especially with that stroller size.
Personally, I am not convinced by the build of the Silver Crosses, and the Dune already got quite a few not-so-good reviews.