It's an interesting article. Not really sure I'd agree with it all but I think looking at the positional groups, is interesting to do.
On the defensive side of the football the 9ers are much better in the front 7, but Seattle is much stronger on the back end. We'll see how that pays out this season.
On the offensive side of the football, Seattle is significantly better at all skill positions except for running back. Lines are maybe equal or may favor Seattle with the FA losses the 9ers have. Who knows.
If Charbonnet is what he is penned as, he gives an oft injured, aging, yet still effective CMC a strong challenge. Deebo is the 9ers strong factor, but JSN may prove to be even better at that job.
Overall, I'd say the games should be much more competitive than last season and a joy to watch and attend.