I would say it is a tessera stripe (het anery). I have bred tesseras the last two seasons and all "normal" ones have had quite pronounced side markings (all dots not stripes and mainly missing like yours).
Has it any belly checkers? I know some tesseras have no checkers and this on its own would not be proof that it is a stripe in the case of tesseras. All my hatchlings have had at least one well pronounced check to date and some have loads.
Were there others in the clutch showing more normal side markings?
My guess would be that both in the pictures are tesseras.
If you look at the stripes on a striped corn there is a wide middle "stripe of background colour flanked by two very narrow stripes of the usually darker colour.
With tessera stripes it is usually a narrow central stripe flanked by two wide stripes with the bottom edge uneven or fading. Sometimes the central stripe is edged with a very thin line of black but I guess the slight hypo character of striping would probably loose this anyway.
The way the stripe meets the head and the colour of the head in relation to the stripes is often different as well.
I know this probably does not make a lot of sense but I tried to explain what I wanted to say the best I can.
I wonder if Charles Pritzels "Hypomacro" ID system would work to tell the difference between stripes and tessera stripes? He has found that most morphs show different patterns of dots on the scales. You would not have to prove anything only that the pattern of the dots was different in tesserae stripes and normal stripes! (Have you got a microscope?)