The comparison from MOH for the various shield plan may not be exhaustive.
However common people like you and me will never see the exhaustive comparison unless you really know someone from the insurance industry. I believe each insurance companies do a competitive analysis against other insurers.
I have seen the comparison and it really depends on what you want and need. No single IP plan can satisfy all your needs.
So do your due diligence.
For me, AIA is on my blacklist since they messed up my Financial Guardian plan many years ago but that is me only.