This seems to be the gist of your entire argument.
First, if you look for a batsmen performing under pressure, then lost/drawn matches are a better indication of situations where a batsmen is under pressure to perform, with the rest of the team (the bowlers, the other batsmen) failing and with the batsman facing the daunting task of single-handedly rescuing his team. In such situations, Sachin averages 51. Inzamam averages 35. Sachin has shown himself to play better under pressure in those conditions.
Why are lost/drawn matches better? What if a batsman is under pressure to perform, and WINS the game for his team, as Inzamam has done on so many occasions. For example, 2003. Pakistan needed 100 or so runs with just 3 wickets in hand v Bangladesh. Inzamam was at one end, bowlers at the other. The wickets kept falling, till I think 40 runs required with the last wicket. Bangladesh could have won that test, but Inzamam somehow managed to win the game, and took the game by one wicket.
Now please don't post examples of Sachin doing this, because A)I don't think he has, and B) Thats not the point. The point is most GOOD pressue knocks lead to a win.
Second, your entire argument rests on the statistical fact that Tendulkar averages 62.11 in Indian wins, while Inzamam averages 78.16. What you repeatedly fail to see is that the Indian middle order, for most of the past two decades, has also contained Dravid, Laxman, and Ganguly. For the first decade of his career, Sachin has also had to contend with Azhar and for the second decade, Sehwag. Dravid has scored 10,246 runs, while Ganguly and Laxman have scored 6888 and 6000, respectively. For much of his career, he also had to compete with Azharuddin and Sehwag, who scored 6215 and 5024 runs. Now, take a look at the Pakistani side. Other than Yousuf, none of Inzamam's peers have scored more than 6000 runs. Sure, Inzamam had Anwar and Younis Khan, but they only scored 4052 and 4816 runs. Why is that important, you might ask. It is important because if you look at the statistics, you will see that Dravid averages 71.54 in those same Indian wins, Azaruddin averages 63.61, with Laxman, Sehwag, and Ganguly averaging 51, 50 and 46. This means that, for most of his career, in any chase for a win, Sachin competed with those five batsmen (Dravid, in particular, with his 71.54 average) to score the required number of runs. This, obviously, means that he couldn't score as much. I will, once again, say that Inzamam performed admirably to average around 78 in Pakistani wins. That emphasizes his importance to the Pakistani side's victories (which you have to remember included the likes of Wasim Akram and Waqar Younis, whose bowling resulted in most of those victories). But, that isn't the only indication of a batsman performing under pressure. In matches where the entire team fails and it is almost up to one batsman to try to save his team and pull of a draw or stave off defeat, Sachin, again, averages 51 and Inzamam averages 35, which shows him consistently cracking under the pressure when the team needed him to save a match.
Guess what - Saeed Anwar averaged 66.29 in Pakistan wins, Younus Khan averaged 67.90, and Mohammad Yousuf averaged 59.47, and Ijaz Ahmed averaged 46.46. Add that up, and compare to the Indians you've mentioned, and the Pakistani averages are higher. While Tendulkar had to deal with one player (Rahul Dravid) Inzamam had to deal with 2 (Anwar and Younus)
