Originally Posted by Faster
We have friends (a couple in their 60s) cruising Grenada to Antigua each winter on their B First 36.7. They live simply and don't miss/need the amenities offered in the Oceanus series. They sail fast, mostly heavily reefed, and often a bit wet in the trades between islands. They have a blast, but are definitely in the minority looking at the typical boats cruising the region. The 36.7 has stood the test for the last 8 years without any issues.
There will be more comfort in the Oceanus.. less performance too.. so it's up to the priorities....
There are a couple with a First 40.7 that sailed extensively including the Antartic seas and love their boat.
I would say that the First is a better sail boat in a sense that sails better, is more stiff and probably more seaworthy.
It is obvious that the Oceanis offer more amenities for cruising, with more space, more tankage and so on.
If it is up to you to decide.
I would say that if you can cruise comfortably on a First and it offers you enough space for living...well, it sails better, is more stiff and has a bigger AVS and overall stability than an Oceanis. You have to define your priorities