This must be very confusing to the newbie! So the question might be asked, do the ends ever justify the means? Why can't we use the general description along with the general construction as the two most vital points in naming a marble? After that, if a name has already stuck then we are doomed to live with it, right or wrong.
In the case of the Superboy, it is clearly a cut and dry issue. First we use the description followed by the construction, and when compared to the example in question we can use logic based on the criterion. Superboy's are blue base with orange-looking ribbons which were from the red and yellow of a Superman that mixed and blended to make the orange.
However, there are some Supermen that have the same blended orange on some of the ribbons, but not on all of the ribbons, leaving ribbons of unadulterated pure dark red as one of the colors on the blue base. In this type example, it is clear to me that this is still a Superman, not a boy. The one single and clearly defined difference to me is that one is a two color color base NLR and the other is a distinct three color color base NLR.
Please, this is only my observation and opinion. I will add some pix soon to illustrate my ideas. Thanks for looking!!