If anyone could tell you, it'd probably be him...
As far as Saga goes, there are no true variants for Boba Fett: Kamino Escape, aside from the background/no background packaging variant.
The unpainted visors on any of the Fett or Clone Trooper figures are straight up errors.
There is only one figure variant that pertains to Jango, and thats the unpainted/dull armor Jango.
if you look at Baby Boba's helmet pack in, you'll notice it's totally gray with black flecks, like the variant Jango's helmet. So, put two and two together, and you'll see where all the "wrong colored" Jango helmets went to.
You can determine the jango variant by comparing date stamps, as the Jango Fett w/ dull armor variant was only shipping with the figures packed with background cards.
So, there aren't any Baby Boba variants.