Why Are Lightroom File Sizes Smaller Than Elements Equivalents?

I have been struggling to get good quality thumbnail sized images at small enough file sizes for a website. The only problem is that the versions I have done through Lightroom via the Web Module using the Flash template, will only allow a maximum width size of 191 pixels, whereas I'm looking to achieve 250 pixels wide. Doing it through Elements image resize box gets me the size I want, but for a decent quality, the file size is much larger. 
Out of curiosity and for comparison, I made the Elements versions the same dimensions as the Lightroom ones. In order for the file sizes of the Elements ones to come even close and yet not as small as the Lightroom versions, I had to reduce the Jpeg quality to zero. This rendered them unusable.
I can't understand why two related applications doing exactly the same thing can differ so wildly. Can someone tell me what is going on?

Hmmm??
Not To Sure??
But I will try to find out..
Keep you posted about that.
Phillip

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