I would request you to read my last post as I have edited it, citing in all the major news regarding the subject chronologically ...
Talks for Su-35, Mi-35 sales to Pakistan are underway: Russian Deputy FM | Page 159
Secondly, It is not simply a case of one source says this .. the other one says this ..so take what you like ... when it comes to sources ... It's a tweet of a person who people don't really have a clue about ... when it comes to reporting in defence related matters .. he could be an excellent journalist .. but whatever he said was in his personal capacity on his twitter ... he never brought in an article, never involved in his institution that he works for ... so the credibility of such a report is quite flimsy if you ask me ..
On the other hand you had a complete article in Janes a reputed Journal in defense ... an institution that has a long history of reporting credible news etc. Other then that you have Sputnik International, another credible institution when it comes to reporting related to defense matters citing Pakistan as a potential customer for SU-35 ... then the Deputy FM's news as reported on Sputnik ..
Bottom line, these are not two well respected institutions reporting conflicting news, these are well respected institutions reporting one thing and "journalists" based on their private links ... quoting something different ...
Lastly, regarding that last piece in which India said it would never undermine India's security etc. It was only reported on Indian based websites, however even if credible ...
it does not ...not even once state that the news quoted was false ...
Infact if you go to the original news piece on Sputnik where the revelation of Russia's Deputy FM talking about the talks of sales of SU-35 and Mi35 the exact quotes of the Deputy FM say that he believes that these items will not cause any jealousy on the Indian side ...