Early reports suggest that while both movies have done good business overall, Jab Tak Hain Jaan has scored the highest Diwali opening of any film released during the festive period.
Trade analyst Taran Adarsh revealed the global box office figures of the two films on Twitter, saying: "UK [revised; all screens added] - Tue: #JTHJ £158,342 from 86 locations [Rs 1.38 cr] ... #SOS £ 28,787 from 69 locations [Rs 25.10 lacs].
"INDIA Boxoffice - Tuesday: #JTHJ 15.23 cr [2500 screens] ... #SOS 10.72 cr [2000 screens]. UAE Boxoffice - Tuesday: #JTHJ $ 325,000 ... #SOS $ 53,000.
"#JTHJ opens to a fabulous response in UAE. Collects $ 325,000 on Tue. #JTHJ USA figures have come in. Collects $ 330,000 on Tuesday. FANTABULOUS!
"Overseas Update: #JTHJ is ahead of #SOS by a BIG margin.
"#JTHJ India biz [15.23 cr nett] is *highest ever* for any film released on Laxmi puja day. It is also @iamsrk 's biggest opener so far."
Bollywood Business host Komal Nahta suggested that despite the lower box office returns, Son of Sardaar had also won over audiences, saying: "Small centres audience going crazy over SOS. Collections of the kind never seen before!!!!
"Both films open very well at most places. JTHJ full at many many cinemas. SOS 70-90% at many centres. Happy Diwali indeed for trade!"
Commenting on the positive reception to his film, Ajay Devgn said on Twitter: "Yaaron, Dosto aur Pathano!! Diwali ban gayi dumdaar kyuki sath tha tum sab ka pyaar. Thank you so much for the love and support :)."
The two films were pitted against each other when it was revealed they would release on the same day.
Devgn filed a complaint against Yash Raj Films after alleging that YRF was using its dominant position to ask exhibitors to dedicate more screens to its film Jab Tak Hai Jaan, adversely affecting Devgn's Son of Sardaar.
Trade analysts predicted that both films would suffer a 30% loss in potential revenue as a result of the dual release.
Photo gallery - Jab Tak Hain Jaan's Mumbai premiere:
Copyright: PA Images Rafiq Maqbool/AP