After the Thursday launch, the auto was due at the Catalunya Circuit, for a filming day followed by the start of pre-season testing on Monday, Feburary 26.
"The step that we have done in 2017 was incredible", he said.
"You get used to it and you don't really notice it".
"I think we need to look after the driver's safety, but what we have implemented is aesthetically not appealing and we need to come up with a solution that simply looks better".
The sport's oldest and most successful team are hoping the vehicle, with more red and less white in the livery following the departure of sponsor Santander, will take them to a first championship in a decade.
"Our goal is to always be faster".
"To stand here now is very special for all of us".
The new challenger has a longer wheelbase to move it more into line with rival Mercedes' design.
Vettel says Ferrari has learnt from its mistakes a year ago and are "completely fired up" to beat rivals Mercedes in the upcoming season.
"We're capable I'm certain", said team principal Maurizio Arrivabene.
Ferrari technical head Mattia Binotto said the vehicle, narrower and with a slightly longer wheelbase as well as more aggressive sidepods, was an evolution of the 2017 one which performed well on slower speed circuits but lacked reliability.
However, closer inspection reveals plenty of significant changes to the chassis, with the vehicle having both a longer wheelbase than its predecessor, as well as an even more aggressive sidepod design, a revised cooling system and updated aerodynamics.
Ferrari have not won the constructors title since 2008 with Raikkonen last winning the drivers title for Ferrari in 2007.