Hayes brake hose one-piece compression bushing vs. two-piece (barb + olive)

I just bought a set of Hayes Dominion A4s (the first Hayes set I've ever owned; always ran Formula or Shimano in the past) and am getting ready to trim the hoses, but I noticed two versions of the Dominion service videos, both seemingly from official Hayes channels:

https://www.youtube.com/watch?v=dwGkylPOZXw (from 2024) shows a one-piece compression fitting (integrated barb and external barrel).

However, https://www.youtube.com/watch?v=Yqxi5pEmJpc (from 2022) shows a two-piece configuration (small barb goes into the hose, while the olive is pre-mounted in the master cylinder). The spare parts bags that came with my brand-new brakes correspond to this setup, with a small barb, olive, and new compression screw. The one-piece bushing is not included, although I see that they're widely available online.

The Hayes A4/T4 service manual at https://hayesbicycle.zendesk.com/hc/en-us/article_attachments/25950208026903 shows the one-piece setup, but the Hayes support page also links to separate one- and two-piece installation guides, not apparently specific to a particular brake model, at https://hayesbicycle.zendesk.com/hc/en-us/article_attachments/1500006810682 and https://hayesbicycle.zendesk.com/hc/en-us/article_attachments/1500007276741 .

Anyway, I expect there's not much difference, and that since the two-piece version was packaged with my brakes, it should work just fine. I'm a little annoyed, though, that the brand-new brakes I just bought are apparently older stock with presumably older hardware revision. For those of you with experience on both setups, is it worth ordering the one-piece fittings? Are the two hose styles fully interchangeable across all Dominion master cylinders, or have there also been changes there, where some master cylinders pair best with the one-piece fitting and others with the two-piece?

I assume the Hayes engineers had some reason for the change (better seal / less frequent bleeding?) but they don't seem to explain it very well, and they didn't bother to discuss the old system in the newer videos and manuals.