SRK-Salman rivalry was more famous because they were good friends for long time and then they went all WWE on each other with punching & kicking and powerbombs & spears, so their so called dushmani became talk of the town..!!
SRK-Aamir rivalry was less talked about, otherwise they were taking digs at each other for a long time, and now they are having meetings over extra martial affairs..?? Wow, they've come a long way, from calling each other names to this..!!
And yes, i agree that Aamir has went ahead but you never know, all you need is the right movie at the right time, things and equations might change again ;)
But yes, on a personal level, their relationship is now more calm and mature..!!