About the Trumpeter HH-65:
The Trumpeter kit is based on the SA365N, that actually has a smaller fenestron. The HH-65 has a newer, bigger Fenestron. The other important difference between the HH-65 and the Dauphin that's subject of the Trumpeter kit is the engine-housing: the housing on the HH-65 has a different shape.
Interior detail on the Trumpeter kit is minimal. I have built several of them. They go together pretty well, but I have mixed feelings seeing it on my shelf: somehow the thing just doesn't seem to "sit right" on its wheels and the frontal part (windscreen and pilot doors) seem too wide to me. One the other hand: it's the only AS365N available in 1:48, so I'm glad it is here.
Good Luck!
Gertjan