Sorry, but I must agree with @orenshani7, planes made by different countries, or for different companies by a plethora of various companies, all look different in design, have different even if similar capabilities, as well as different signatures when detected using radar and infrared, all meaning that telling them apart wouldn't be hard, and regardless of that, planes are routinely painted certain colours depending on where they are in service. The bottom of planes can be colored in blues and greys to blend in with the sky, while the top of planes are painted colors intended to help them blend in with the terrain around which they are stationed. Russia being where it is, they camouflage with forests, mountains, and snow in mind. The USA loving its endless wars in the Middle East however, paints many of its planes, (when they bother to at all,) sand colors. However American planes based in Alaska or stationed in a Northern European NATO ally state, should be painted much the same color as their Russian counterparts.

While I love a good conspiracy theory as much as the next guy, I give this one 3 building sevens out of 10.