We have noted several times that all the previous incidents relate to Syrian Airspace in which Turkey claims a no fly zone and which the media obligingly refer to as Turkish Airspace.
At no point have I read a claim that the Russian Aircraft has crossed the border (previous graphic excluded) and certainly not engaged in combat while over the Turkish side of the border.
You do not have to be a genius to guess that with what is pretty clearly an attack on a Russian Aircraft operating in Sovereign Syrian territory at the invitation of the Syrian Government, Senior Russian officials will now be asking their NATO "partners" if this was a NATO attack on a Russian Aircraft?
I'm not sure, whining to the western press is one thing, actually shooting down a Russian warplane is a completely different ball game.
I think Turkey are on dangerously thin ice even if the graphic they released is accurate, and that the Russian plane did, technically if marginally violate actual Turkish airspace.
If there wasn't any over-flight at all, Article 4 would, technically not even be an option, in which case other NATO states would not be obliged to come to Turkey's aid if Russia decides to seek retribution (so long as it doesn't got too far).
As I already noted, Turkey's actions with regards to ISIS and other terrorist organisations and groups have been deeply unpopular with many major NATO members, and they would be absolutely loathed to be compelled to send their own troops to fight and die and risk nuclear war for Turkey, over this issue.
For Turkey to have shot down a Russian fighter without any over flight would be a massive strategic blunder on the part of the Turks, and one for which they would pay dearly if that was the case.
Hell, even if things happened exactly as Turkey claims, they are still likely to pay dearly for this. But it would be so much worse for them if the Su24 never cross the Turkish boarder at all.