Put it this way - If I had to choose between Lara, Ponting and Sachin to pick my best side, I would pick Ponting.
If I wanted one of the three to bat for my life, I would choose Sachin.
If I wanted to just watch someone bat, I would pick Lara.
I agree with that and honestly, I do think it is all pretty close between the three for the matter to boil down to personal opinion.
But the stats which seem to split them clearly themselves are out of a pretty minor sample that it is difficult to make any concrete statements on who is better among the 3.
As I said, over the time of my watching, against a quality attack, I rate them this way. (some of it is based on stats, some on my watching, some on peer rating..)
Sachin is the least likely to fail... He could score you at least 30 or so even in the most difficult conditions.
Ponting is the most likely to consistently dominate... He will definitely score big knocks if he can get over the initial period but the fact that, due to his career starting in the mid to late 90s and him being an Australian, he has never really been tested as much as the other two against quality bowling... It is not his fault and he is as likely to have fared great as he is to have failed against them but it is just difficult to rate him with nothing to go by... Plus, I feel he is even more vulnerable than Lara at the beginning of his innings (that is amazing, coz I felt Lara was pretty vulnerable early on).. Again, juz my opinion and may well be contrary to facts in others' eyes but that is what I have felt watching him over the years...
Lara.. he may well get out for 0 while the other two can at least get 20 or 30 but I don't think my team will lose by such close margins and I would rather prefer a guy who will take the game away when set and in this regard, Lara is peerless.. He has managed double centuries with no support against the best bowlers of the generation against huge pressure (mainly due to how dismal his own side was) so I pick him first.. Sachin second and Punter 3rd..
As I said, I agree that there is very very little seperating them and it juz comes down to preference, which would be a good reason why most ex players and commentators around the world are just as split in opinions about the 3...