Photoshop Save as JPG vs. Image Ready Save Optimized JPG

Curious Bystander

I've been using PS for a long time (10+ years) and haven't found an answer to this. Maybe I'm not looking hard enough?

Is there a difference between saving a file from the normal Photoshop 'Save as' option as a JPG versus using the 'Save Optimized as' option using Image Ready's save dialog box?

I know the reasons when I should and shouldn't save as JPG, but I want to know if PS or IR is better, less lossy, etc. I have experimented with both options and the PS save creates a larger file (using the maximum - PS 12 vs. IR 100% - quality in both).

Edit: One other thing, I'm not going to use these on the web, but instead print them using an online service like Snapfish, which does not accept TIF files.

cbadland · Posted: Mon Dec 19, 2005 10:27 am Post subject:

It’s my understanding that “Save As” keeps all the metadata (file properties, camera data) including color profile and thumbnail image with the JPG file.
Using “Save for Web” (same as “Save Optimized” in IR) strips the file of most all non-image information associated with it to make the smallest file size for web-bound work.

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