One-piece bats provide little or no give and have a stiff feel when contact is made with the ball. Due to the fact that one-piece bats have a very minimal amount of flex at contact, little or no energy is lost which results in more power. For this reason, one-piece bats are preferred by stronger players with above average bat speed such as a power hitter.
Two-piece bats provide more flex at contact with the ball. The two-piece construction creates a “whip” effect that results in an increase in bat speed. An increase in bat speed results in an increase in power. For this reason players with average or below average bat speed such as a contact hitter, prefer two-piece bats.
The biggest benefit that composite provides over an alloy barrel bat is the barrel length. Because composite is a lighter material the barrel can be stretched longer than an alloy barrel bat without making the swing weight heavier. The result of this longer barrel provides composite bats with a bigger sweet spot