What's difference between E.M. Magic Swf2Avi and common swf converter?

Feature

E.M. Magic Swf2Avi

Common Swf Converter

AVCHD

  Convert and burn flash to AVCHD
  which can work on PS3 or Blu-ray
  Player

  Common swf converter don't have
  this function. 

HD

  Very easy to help you convert swf
  to HD video formats like HD WMV
  Video, HD DivX Video, HD Xvid
  Video, HD H.264 Video, HD Quick
  Time Video, HD MPEG4 Video, HD
  FLV Video, HD TS Video

  Common swf converter don't have
  this function. 

Video Quality

  No lost frame during conversion.

  Capture from the screen;
  Lost frame if CPU speed isn’t
  enough.

Audio Quality

  Get excellent quality of the
  created video and audio with
  exactly synchronized audio and
  video.

  Record from the sound card;
  Video and audio often
  asynchronous.

Alpha Channel

  Very easy to convert swf to PNG,
  TAG, TIFF image sequences with
  alpha transparent channel.

  Common swf converter don't
  have alpha channel.