Flickr vs Share on Ovi: Resizing Quality

There are many photo sharing sevices. I use Flickr and Share on Ovi. In addition I use Radar for mobile photo. But now, I focus on Flickr and Share on Ovi.
To use a photo sharing service mainly, some points are important. This time I'm making a comparison of their resized image qualities.
I have the photo resized by Flickr and one by Ovi, which are originally same photo. Flickr's 'Medium' size is near the Ovi's 'large' size. Now, Flickr's and Ovi's are shown below.
A. Flickr (Link)
Resolution: Medium (width = 281px, height = 500px)
File size: 86KB

B. Share on Ovi (Link)
Resolution: large (width = 287px, height = 512px)
File size: 24KB

Ovi's resolution is bit higher but its file size is much smaller than Flickr's. In the result, Ovi's photo is lacking in sharpness. If you're using Share on Ovi as a main photo sharing service, you have to accept this quality lacking.
Resized photo's quality is very important for bloggers / web authors to embed in blogs / web pages. I hope Ovi's resizing quality wil be improved.