The ROBINS-I and the NOS had similar reliability but differed in applicability: A random sampling observational studies of systematic reviews/meta-analysis.
Yuhui ZhangLitao HuangDandan WangPengwei RenQi HongDe-Ying KangPublished in: Journal of evidence-based medicine (2021)
The ROBINS-I and the NOS seem to provide the same reliability but vary in applicability. The over-complicated feature of ROBINS-I may limit its usage and a simplified version is needed.