Though I dint saw SPA but i have 100 percent believe on Smriti, she is not a kind of woman who will pretend to laugh out loudly to grab viewers attention, she mite enjoy ronit performance so much that she laughed genuinely..why u have to compare st and smirti then.. maybe ST wanted to look decent since she is afraid to get noticed for these small small things by reporters.... thats why she smiled only..
Smriti is really mature and u know na, Shweta also thinks smriti is her senior.. dont compare these two..