During my search for an S300i/A30i, I called a lot of stores. I have no dealer closer than 50-60 miles away so I was happy to pay for reasonable shipping costs.
One of the store owners I spoke with mentioned his opinion on the A30i and S300i. While he made it clear that they were essentially the same unit, he said they are made in different manufacturing facilities and, in his opinion, the S300i had a slightly nicer manufacturing facility and that might be reflected in the build quality. At the same time he said that he doesn't have service issues with either and no problems recommending both models.
I'm not aware of any price difference at that particular store (though a different store was able to sell the A30i for $50 cheaper than their S300i). I suppose either a) he actually had some industry awareness or b) the S300i had better margin. Who knows!
Just curious if anyone else encountered that opinion while shopping for a cleaner.