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Although I can't say which black is the correct one, I can say that I have used the SEM dye and it really is a great product. The color match on the light gray leather I had in a past car was excellent. Just make sure you use their cleaner and prep first, and use light coats of the dye. Proper prep and taking your time is the key to this turning out well.
I changed the interior color from light camel to black. Had to buy some misc. trim parts and they where NOS factory black. The SEM Satin black matched perfect.
I doubt that you can remove that overspray without doing some surface damage to the vinyl panel(s). I think you would do best to buy some [liquid] SEM Colorcoat {dye} and recolor any interior components that require it. It would be best to remove any such panels and then reinstall them. The exceptions to this 'rule' might be the upper dash pade and/or the driver's dash pad.
You might want to try a clay bar kit and see if that helps at all. The Magic Erasers may work as well, but it too may dull the plastic.
Worse case scenario, you would have to re-dye. I have used the SEM spray as well and it works great. You just have to use mutiple light coats as to not fill in all of the grain pattern, and do not spray if it is very humid outside, as the dye will want to blush (turn cloudy).
You may want to confirm you pieces were painted or if they are molded in black. As someone suggested factory NOS SERVICE REPLACEMENT PARTS were eventually all molded in black and sold to "color as needed", once the molded color stock was depleted. Just made sense, not to mention cost effective, to do all one color...... black.
Always thought this was an advantage to someone with a black interior, not having to use SEM or another elastomeric paint to color the interior. If they are molded black you may want to try something a bit more agressive to remove the paint. Just do it in a inconspicuous
area first.