The real question here is: Are 6-foot planks better?
The 8, 12, 16, 20, and 24-foot lengths of composites and vinyl "boards" have more to do with the manufacturing extrusion process than installation convenience. It is a classic story of marketing fitted to manufacturing. Flooring does not do this, yet the floor installer teams can lay 300-600 square feet a day.
The logistic requirements for handling the product grow with the length of the product. Trucks, pallets, trailers, shelving, elevators, doorways, labor, miter saws, and bending/bowing leverage are all challenges on the long plastic boards. The primary argument that longer runs equal fewer cuts, which means less time is usually shared to support the idea for longboards. It has nothing to do with aesthetics.
One carton (6-foot) of end match Bamboo X-treme® equals 18 linear feet. Just three pieces? It is easier to handle, ship, and install. The end-match plank's precision machining on the short edge is so well done that it creates a tight continuous plank that floats between joists. One person can handle the placement. Storage, staging, and cutting are all made simpler. Long runs are possible with fewer cuts which is parity to the argument for plastic extruded longboards.
Designers have embraced aesthetics like wood flooring for its natural appearance. Likewise, seams between the deck planks are natural versus seamless plastic, which is a tell-tale sign of synthetic.
So the answer is no, the Longer planks are not a better solution.