Since you asked for Salman vs Aamir...
Both are great records, but Aamir's stands tall because those 5 back to back BB's were chasing the records of Aamir's films in last 5 years.
To talk outside records, then Salman has love while Aamir has respect from their audience. The backbone to the "Trust" they've gained over the audience is based on that.
Now don't question me, "Is Aamir not loved?" Because that was not the meaning of what I said.. You can't put super stardom & quality films on the same level. One is a result of love or mad love/following, while the other resulted in immense "Trust". There's love but it's quoted under these emotions.