I have sailed aboard the Bristol 41.1 and have boarded several E42 & E43, but never sailed them. Here are a few observation.
Both boats were built for coastal cruising, not true blue water boats. Neither boat is considered to be a "performance" cruiser., but make great liveaboard-cruising boats (based on the conversations I have had with owners who are/were fulltime cruisers).
The Endeavour was built specifically for cruising the areas you mention. I don''t think the Bristols were built for the tropics (ventilation).
The Bristol''s aft deck stowage
hatch covers are raised (I remember tripping over them), they are flush on the Endeavour. Both decks are easy to move around on with good grab-bar placement.
Later models of the E42 had a scooped transom. The Endeavour''s tanks are impossible to get to and owners have had extreme difficulty replacing/fixing leaking
holding tanks (don''t know about the Bristols.
I wish I had more info to give you. Very surprised that Jeff H and Whoosh haven''t offered any thoughts.