Scotch Game - open Sicilian ?

In my experience playing against bots and practicing, I noticed that Scotch game becomes very similar to sicilian, albeit little difference in pawn use. 

here is scotch game:

we can also create a very simmilar position in open Sicilian:

with these set-ups, we can see that the only difference is the pawn gap in black's pawn line at e7 (in scotch) from c7 (open Sicilian).

this could result in 4. kxd4, and then (in Sicilian) g6, or in scotch game kf6, bc5 or bb4+

The only difference is the pawn, but that's a big difference

no its totally different

The differences:

1) In the scotch, blacks missing e7 pawn allows him to develop his f8 bishop more easily. Thus bc5, bb4 or nf6 with the goal of casting soon are on the cards because

2) with the e file already being semi open, it is easier for white to open lines and try to attack blacks King.

3) In the sicilian, both Black's e and d pawns are able to move forward more freely, whereas in the scotch, blacks c-pawn is stuck behind the c6 Knight. Thus, black may fight a little bit more for Central control in most sicilian lines than in the scotch. This does not mean the sicilian is better for black than the scotch.

4) when the e-pawn moves in the sicilian, this leaves squares weak on d6 and sometimes on D5 and white will more often play to exploit these weak squares. In the scotch it is much less common for the c-pawn to move thus less common for these d6 and D5 squares to be weak.

5) In both openings, black will want to try and play D5 at the right moment, staking his claim in the centre. This usually will come after castling, though certainly not always.

Both openings are awesome but by virtue of these factors and more, they are very different in the subsequent middlegame strategies employed.