Saying “RVIA Sticker” is like saying “Kleenex”.
Lots of companies make “facial tissue” but only ONE company makes “Kleenex”. You can blow your nose into either.
The RVIA label is merely a certificate that says the RV it’s affixed to meets NFPA / ANSI life safety standards. In your case the manufacturer chose a different route to accomplish the same thing.
From the company’s website “Your new trailer has been constructed to conform with or exceed federal and state safety requirements. Quality assurance methods and/or functions meet or exceed standards prescribed by ANSI/NFPA 1192 or CSA Z240 as approved by the agency having jurisdiction in the United States or Canada.“