It depends on what your listening priorities are.
Each are capable of delivering high end sound quality with the right application and supporting system.
Edit- there are very few truly single driver speakers on the market.
Single way or multiway
The founder and builder of the highly respected high-end speaker company Gauder Akustik, Dr. Gauder, says that using a full-range driver is very bad. He uses 3- to 4-way speakers with extremely complex 10th-order crossovers consisting of 58–60 components.
In contrast, some other well-known and equally respected speaker companies — such as Voxativ, Zu, Cube Audio, and Totem — use crossoverless designs.
Who is right, and who is wrong?