Damselfish
Contributor
PH and Aggressor are generally towards the higher end of liveaboards. They are sometimes described as luxury but that's luxury on the LOB scale, not the Ritz. They're luxurious compared to Blackbeards at the low end, or Nekton someplace in the middle. The PH and Aggressor boats can be a little different in atmosphere, but that varies from boat to boat. They're basically at the same level of quality, which also varies a bit from boat to boat. I would not call all Aggressors stable. They have some cats and some monohulls. The cats are obviously more stable than the monohulls. The ride depends a lot on the location and weather too.
The Kona Aggressor is easy diving and a good first liveaboard experience. It's a little different than land based, as they usually travel far south down the coast where the dayboats don't go. And you don't have to get up so early to meet the boat. Much lower hassle factor for more dives than land based. But if you've already done your fill of Kona diving I'd choose someplace else, as the diving won't be tremendously different. I will say, when I was on it the food was by far the best of any liveaboard I've done, and better than most restaurants on land for that matter.
As far as boats that dive the same areas as land based ops. The Utila Aggressor comes to mind (and formerly the Bay Islands Aggressor) as often criticized on this. There's so much more they could do in that area. Another is the Cayman Aggressor. It does usually dive all 3 Cayman islands on one trip, and you'll probably get in more dives than land based - but again it's all sites you could do land based. There's still plenty of people that will prefer these trips over land based for various reasons, it depends what's important to you.
The Kona Aggressor is easy diving and a good first liveaboard experience. It's a little different than land based, as they usually travel far south down the coast where the dayboats don't go. And you don't have to get up so early to meet the boat. Much lower hassle factor for more dives than land based. But if you've already done your fill of Kona diving I'd choose someplace else, as the diving won't be tremendously different. I will say, when I was on it the food was by far the best of any liveaboard I've done, and better than most restaurants on land for that matter.
As far as boats that dive the same areas as land based ops. The Utila Aggressor comes to mind (and formerly the Bay Islands Aggressor) as often criticized on this. There's so much more they could do in that area. Another is the Cayman Aggressor. It does usually dive all 3 Cayman islands on one trip, and you'll probably get in more dives than land based - but again it's all sites you could do land based. There's still plenty of people that will prefer these trips over land based for various reasons, it depends what's important to you.