Comparing Teaser trailers to Theatrical trailers - "The Avengers"

Similarities

• Both trailers include the production company logo/s, which in this case is "Marvel" and "Paramount".
• Both include release dates for the film, however the Teaser trailer has the exact date, however the release dates are at different dates.
• They both include short clips and images from the film.
• They both include websites and social media indications.
• Both include the title of film.

Differences

• There is more narrative in the theatrical trailer than the teaser trailer. This is mainly due to the fact that theatrical trailers are longer then teaser trailers.
• Again there is also more development of character/s in the Theatrical trailer, the audience gets to see the characters life prior to the assembled group, this differs to the teaser trailer, as the Teaser trailer only gives a broad view of the characters, and what they do. 
• There's a broader range of sound and music in the Teaser trailer compared to the theatrical trailer
• The teaser trailer is shorter in duration than the theatrical trailer.
• The music and sound on the teaser trailer and the theatrical trailer differ, the music and sound in the teaser trailer is faster and has more impacting sounding music and sounds compared to the theatrical trailer which has less.