A potential advantage of inactivated virus vaccine is that it can raise antibodies for all viral proteins and not just a subunit of the spike protein, which would make it harder for future strains to evade the immunity. I think this is also the model implicitly behind this claim that natural immunity (from being infected with the real virus) is stronger than the immunity gained from subunit (eg mRNA) vaccines. (I make no claim that that study is reliable, and just on priors it probably should be ignored.)
A potential advantage of inactivated virus vaccine is that it can raise antibodies for all viral proteins and not just a subunit of the spike protein, which would make it harder for future strains to evade the immunity. I think this is also the model implicitly behind this claim that natural immunity (from being infected with the real virus) is stronger than the immunity gained from subunit (eg mRNA) vaccines. (I make no claim that that study is reliable, and just on priors it probably should be ignored.)