If we had fuel tanks exploding in ground fires there would be signs of over-pressure and ruptures. Ullage ignition is more likely associated with higher energy sparks or time enough for the heat to boil the fuel.
Still to be seen is whether the over-wing departing engine ruptured a fuel tank before the later explosion.
In one of the videos looking head-on at the aircraft there is plenty of dust/smoke but little visible fire and yet the motion of that slide much later is quite violent.
As far as the cabin is concerned, there is little smoke and fire visible inside when the video was taken. However once the RH doors were left open and the external fire took hold it seems to have entered the cabin and flowed along the ceiling.
Good that the passengers got out quickly, but what doors you open can make a difference in how much time you have vs the location of external fires.
Again any comparisons with the SIA event and this one will still need to wait on many details only available in a final report.
As always your mileage may vary so as a passenger you need to listen for trained crew instructions and not believe everything you read on the internet.