UTVs - BT and Firefighting - Revalidation or Renewal

Alright, I have read alI I can about the Revalidation v. Renewal for BT and Advanced Firefighting. I see that 360 days plus drills means Revalidation. However, a training school is saying that since my UTV sea time is on an uninspected vessel, I need renewal, not revalidation. If my seatime letter says “During the stated sea time, the mariner participated in all onboard safety drills and procedures” am I good to go for revalidation using my UTV sea time? Is the school just trying to sell me a longer class?

@jdcavo I have put together many of your comments and I feel pretty good about going for the revalidation but hoping to get your thoughts on UTV sea time counting?

Make sure it specifically mentions 46 CFR §10.227 (e)(6)(ii)

(6) An applicant for renewal of an endorsement as master or mate (pilot) of towing vessels, in addition to the other requirements in this paragraph, must also submit satisfactory evidence of—

(ii) Ongoing participation in training and drills during the validity of the license or MMC being renewed.

Thanks, this is really helpful and I see that Title 46 → Chapter I → Subchapter B → Part 11 §11.302 states:
The Coast Guard will accept onboard training and experience, through evidence of 1 year of sea service within the last 5 years

So one more question - as far as I understand, there is no longer a requirement that the year of sea service is on sea-going vessels (outside the boundary line). Is this true?