The price quoted on VTG for an inside cabin is usually the Carnival advertised price for a 1A cabin. If you booked anything other than a 1A cabin it is not the same thing and would not qualify. Same rules would apply for balcony.
7 Norwegian: Sky, Jewel, Dawn, Epic, Pearl, Breakaway, Getaway
9 Windjammer: S/V Legacy X3, S/V Polynesia, S/V Caledonia, S/V Diamant, S/V Sagitta X2 S/V Mandalay