well it would depend what we are comparing here, basically the advantages of a component set are: better crossovers and independent mounting location of tweeter. if your willing to install a new set of speakers in your doors but too lazy to not mount the tweeters in different places to get a better stage then why bother going thru the trouble of replacing the speakers at all.. but if you want to make a better investment in your car stereo get a component set like i mentioned. maybe you will find that the tweeters sounds good next to the mid, you still have the advantage of a better xover. the only advantage there is to buy coaxs, imo, is that you can find them cheap as an upgrade from stock.... period if you worried about cutting your car up to mount the tweeters try this out.... go to walmart and get some velcro with the adhesive backing and stick the tweeter in the surface mount cups (using the velco patches on the back to stick the tweeter where u want them). put the tweeters close to the edge of trim panels so u can hid the wires without cutting a hole for them. (try different locations)