Why islands appeal
An island can create access from multiple sides and provide a strong center for prep, storage or seating.
Why peninsulas can win
A peninsula can add counter and seating space while using one anchored side, which may work better where full island clearances are difficult.
Choose by circulation
The better choice is the one that supports movement and work zones without forcing narrow paths.
Turn the research into a project scope
Online planning is useful up to the point where the answer depends on the actual room, the desired scope and existing conditions. When you are ready to discuss those specifics, call with the project location and the main changes you are considering.