Coastal or Bluewater...
The boats you mentioned were built before the RCD came into effect and, in any event, are American built while the RCD is an EU invention...so I''m not sure the RCD classification will help you (nor should you rely on it, which is indeed a different subject...).
There''s a big difference between planning a 90 mile open water passage, which allows you to seek wx f''cast data before leaving and transit during such a short period that the wx f''cast and the existing conditions will change little, and voyaging offshore for a period long enough that no accurate wx f''cast data is available, which essentially means you''ll need to be prepared to take on ALL of the possible weather conditions present in that area at that time of year. For the latitude you are speaking about, that is of course a huge range of conditions.
The Oday 34 and Pearson 323 are good examples of coastal cruising boats. To get across the next 1400 NM to Reykjavik will put you into a totally different caliber boat, and into multiple boat systems that exceed those found on coastal cruisers.