[doc] README cosmetics

README.md

@@ -10,13 +10,13 @@ Batsim simulates the computing center behaviour. It is made such that any
 event-based scheduling algorithm can be plugged to it. Thus, it permits to
 compare decision algorithms coming from production and academics worlds.
 
-And here is an overview of a Batsim simulation.
+Here is an overview of how Batsim works in comparison with real executions.
 
-![Batsim archi layer]
+![Batsim vs. real]
 
-Here is an overview of how Batsim works compared to real executions.
+And here is a Batsim simulation overview from a different point of view.
 
-![Batsim vs. real]
+![Batsim archi layer]
 
 Quick links
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