One of the greatest thing about the round diamond is that it is by far the most versatile of the diamond shapes and works well with just about every engagement ring style you can think of. Some of those most popular round diamond engagement ring styles include:

1. Solitaire: The solitaire setting is a classic and timeless style that showcases the beauty of the round diamond. A simple metal band with six or four prongs holds the diamond in place, making it the focal point of the ring.
2. Halo: A halo setting is another popular style for round diamond engagement rings. In this setting, a ring of smaller diamonds is set around the center stone, creating a "halo" effect. The halo adds extra sparkle and makes the center diamond appear larger.
3. Three-stone: A three-stone setting features three round diamonds of similar size, with the center diamond being the largest. The three stones are said to represent the past, present, and future of a couple's relationship.
4. Pave: A pave setting features tiny diamonds set into the band, which create a "paved" or sparkling effect. The pave setting adds extra sparkle to the ring and can make the center diamond appear larger.

The short answer is yes, round diamond engagement rings will generally run at a higher comparative price point but that's still going to depend on the quality, size, and type of metal used.

Round diamonds are the most popular diamond shape, which means they are often in higher demand and can be priced higher than other diamond shapes. Additionally, the round brilliant cut is designed to maximize the diamond's brilliance and fire, which can also make it more expensive.

However, the cost of a round diamond engagement ring can still vary widely depending on the factors mentioned above. For example, a higher quality diamond with fewer inclusions or a larger carat weight will be more expensive than a lower quality or smaller diamond. The cost of the setting, whether it's made of gold, platinum, or another material, will also affect the price.