The one on the left obviously has a cooler effect. The main problem here is that the opponent has time to move during the posing phase. This is a really big problem for Faliyos because his Unleash consists of him dashing forward to grab the opponent. With a one second delay for the dash is initiated, the opponent has time to move away from Faliyos. The image on the left shows how the opponent had time to move away from the Unleash, but accidentally walked into it anyway.
The one on the right, however, looks less cool. The big advantage here though is that the player is able to pose while time is stopped. Right when the player presses the Unleash button, the time stops, just like how it is in fighting games. This gives less chance for the enemy to be able to walk away as the Unleash happens immediately after the pause.