Ok, let me just clear up what I mean...
Dell sells computers by their price more than the features. Dell is not very 'industry leading' when it comes to new technology. They are very careful about what they use (like wireless networking and DVD-R drives) because they are concerned about their profits more (yet not entirely) on the belief that price sells computers, not features. Although, michael dell may claim to have put 802.11 in notebooks first, he's full of hot air, and can't stand it when he's not first (also, he's not in a position to be first in leading technology, so his complaining is futile.)
Apple, on the other hand, while still concerned about profits, cares about their features and customers more than Dell. Apple is willing to take risks in order to make better technology more popular. Apple standardized color, the CD drive, USB, no floppies (which will come soon

, optical mice, LCD's, 802.11b, firewire, ethernet, and a whole slew of different technologies. Even though Apple may not make as much profits as Dell, Apple believes that they can make people's lives better and easier by using these more advanced technologies. If Apple sees a major loss coming from using a certain technology that they didn't see before, they may increase the price, or cut some features.
In this case, dell computers aren't good for technology as a whole, but are good for people with tighter budgets.
Apple takes risks, but usually has greater benefits from them than Dell does, because Dell rarely comes out with something before someone else (except a lower price.) I don't believe that dell has the R&D capacity to introduce new, cutting edge computers that defy tradition (like Apple does), because they operate on that idea that their lower prices will cause their competitors to go out of business. In this case, you really can't compare dell's and Apple's marketing on the same level, because they are radically different.
Anyways, that's what I have to say about dell and Apple.
Just remember, you pay for what you get...