Dak is correct......apples to oranges......yes a lot of electronic components are identical, made by same manufacturers and put into many different branded machines. However the soundcards you need for music production have to be of a higher and different spec from the STANDARD components.....I explained the reasons in my previous posts and gave links as to why.
If you want an analogy try this........using a speaker from a transister radio as a PA system for Carnegie hall will not work as it is not powerful enough or designed for this application.
Ask yourself why some manufacturers have a pro range as well as a domestic range? Probably because the biz models are required to be bigger or do a better job or to work harder or faster.
Ray some of the guys who are telling you about soundcards know what they are talking about...and from experience are telling you just exactly why your ideas are ill informed and totally bunkum and wrong...please believe them instead of trying to form your own ill informed opinion. You obviously have no experience with digital recording on a PC.....otherwise you would know, appreciate and accept that what we are saying is true.
Now one of my laptops went in for repair.... I use laptops for gigging they work sound and lights and backing tracks..bad news it cannot be fixed properly... a repair is not an option as it is not cost effective for the age of the machine or indeed a reliable repair guaranteed.
So I am about to have to buy a new high spec laptop which is designed and manufactured to a business professional standard it costs more than double that of a domestic model. Now I do not want to spend double but I know I have to for reliability and the specs I need to get the job done.

http://www.soundclick.com/bands/songInfo.cfm?bandID=687727&songID=5238055