For this portion, I compressed each image to the lowest compression level possible without going under 25kb.
While this is not conclusive, my subjective opinion is that Photoshop does a little better at maintaining quality.
On average, the Photoshop image is 954 bytes larger*. The average Photoshop compression level is 36.7 lower than the average
Fireworks level. Perhaps this lower number is what leads Fireworks users to believe that they are getting better quality at
a lower file size.
* Sometimes the jump in size from one compression level to the next would be several kilobytes, so some of these images are
a few kilobytes larger than the 25kb target.
Photoshop: 25683 bytes
Level: 25 |
 |
Fireworks: 25127 bytes
Level: 68 |
 |
Photoshop: 26427 bytes
Level: 9 |
 |
Fireworks: 26504 bytes
Level: 50 |
 |
Photoshop: 25895 bytes
Level: 27 |
 |
Fireworks: 25483 bytes
Level: 68 |
 |
Photoshop: 25870 bytes
Level: 1 |
 |
Fireworks: 27430 bytes
Level: 38 |
 |
Photoshop: 28634 bytes
Level: 0 |
 |
Fireworks: 26248 bytes
Level: 37 |
 |
Photoshop: 29793 bytes
Level: 51 |
 |
Fireworks: 25093 bytes
Level: 83 |
 |
Photoshop: 26290 bytes
Level: 46 |
 |
Fireworks: 25757 bytes
Level: 79 |
 |
Photoshop: 26087 bytes
Level: 43 |
 |
Fireworks: 26291 bytes
Level: 78 |
 |
Photoshop: 27182 bytes
Level: 51 |
 |
Fireworks: 25924 bytes
Level: 86 |
 |
Photoshop: 27155 bytes
Level: 51 |
 |
Fireworks: 25622 bytes
Level: 84 |
 |
