I don't think that the difference is significant. It may be just that the technologies that a particular manufacturer uses, for eg. -Intel, AMD etc. is based on quantum speeds i.e. it can take only fixed value, which is a multiple of a particular value, or achieved by adding to a lesser value. Like wise RAM also exists in multiples of 8 MB.
Hi Guest we just wanted to alert you to a major change in the forum. We will no longer be allowing the posting of outgoing links. Please use the attachment feature to attach media to your posts.