Beneteau has several lines...
Oceanis Series (aka the numbers)
Sense Series (the newest)
Also, the built for Moorings as well (so there are some models like the Moorings 352 that are close the Oceanis/Numbers series. Here's my breakdown.
First series - made for performance cruising and even up to one-design racing. Advanced hull construction (this line sometimes uses vacum epoxy layups), beefier hardware including some that have keel stepped masts, and the biggest winches and blocks aboard. They are pricey and often sold new without even a set of sails, as most racers will put custom ones anyway. Interiors tend to be utilitarian and spartan. Fewer batteries, smaller holding tanks, stovetop burners rather than full ranges, no microwaves, etc. Obviously these sail the best.
Ocean/numbers series. This is the bread and butter line for Beneteau. Midgrade/traditional construction. Often come in Euro or USA versions. Euro versions put more cabins and heads in place. The hardware is less beefy, but the price cant be beat. Cheaper than Catalina new, but more than Hunter. Usually have in-mast furling mains (cost reasons). Come with all the kit like more batteries, electric heads, windlasses, dual bow rollers in some case. Great for coastal cruising and some of the larger models would do ok making ocean passages (I'd say 40 ft and higher to be comfortable). Many have wood/teak accents and touches for an owner. These sail fairly well with PHRF ratings that tend to be lower than their Catalina & Hunter peers. A lot of the hull design concepts in the First series trickle down into the numbers series (gennakers, wide beam carried aft, etc).
Sense line - this is a line of what I call baby-boomer boats. Beneteau realizes that Boomers are aging and if they want to stay in a sailboat, they're going to need ease of handling. So these are large boats, but deck salons essentially. Only 3 steps from cockpit (huge) to salon. *FEWER* berths than you'd expect in such a big boat. I guess Baby Boomers dont want their kids or guests as they cruise
Lots of gizmos to make docking and sailing easier (dock-n-go thruster system, electic winches, in mast furlers, etc). Ironically, these boats do sail well, but are currently only 43 ft and higher.
Cyclades line. *sigh*...this is what lowers resale for the whole brand. Strictly designed for charter fleet. Every corner that could be cut, is cut. There are even some boats with significant structural defects because the hulls were built to such a low cost point that the rigging causing stress cracks and issues. They minimize the use of wood, teak...just lots of heads below and lots of berths. They're known as the infamous "Clorox Bottle" boats that were meant to strictly compete against Bavaria and Dufour in the Caribbean charter trade when those lines were undercutting on price. Since Beneteau has moved production to the USA, this line has faded as the USD has advantage over the Euro right now...for a little while longer I guess.
Moorings line of Beneteau boats. Many are the same as the Oceanis line, however corners were cut. No wood, more berths, more heads, less electronics, Yanmar instead of Volvo engines in some models. They're sold to enter the charter fleet, but strangely enough, have more in common with the Oceanis line than the Cyclades line (hulls are built the same way...no compromises there)...just less dressy.