Well spotted! I am staying with my AI comparison, I think the gasoline tank smoke monster was it damaged/breaking down, this electrical sounding version is how it should function when working perfectly, this maybe something to do with the original anomaly that brought the plane down, it required a body as a host whilst it recovered.
I’ve just had a realization!
Locke’s father the kidney thief, the man who Sawyer named himself after …could be the smoke monster!
If you remember way way back, there was a room that Ben told Sawyer whatever you truely wished for will appear, when Ben opens the door it’s the man that caused his mother to commit suicide (Locke’s father).
This idea of “what you truely desire” makes me think back to all the ghosts that have appeared throughout the seasons. If you remember Ecko wanted the forgiveness of his brother, his brother appeared Ecko did his bidding and then the smoke monster killed Ecko, Jack wanted his father. Ben may have truely regretted killing Locke and wanted him back, * maybe that is also a reason why the monster chose to take Locke’s form (in order to further manipulate him into killing Jacob).
Side note: To Ben, Locke appeared to have all the answers, the Island rewarded him with knowledge and belief, Ben however was truely lost, this maybe why the smoke monster tells Ben what Locke was thinking before he died.
Jacob and the smoke monster have been manipulating everyone from day 1, the ghosts that have appeared off the island are probablythe smoke monster aswell - perhaps there was a time when it was allowed to leave the island, this would be a good reason why it would want leave the Island.
I am in agreement, I think Jacob knew he would be killed, this is looking more like a game of chess against the two and everyone on the island are the chess pieces. Jacob the king always protected kept out of sight, smoke monster the knight can’t think of a good metaphor so I will say two faced, since if you always land on the opposite colour you are standing on. =/
Final thought - Do you think Walt was really on the Island, I remember the others despirately trying to capture him, then later fearing him and returning him to Michael. Walt also hung around Locke very often, could he have been the smoke monster all along?