While this is all very intelligent and true - there are multiple differences between the two media (you were right) and how they are perceived by their audience - and while letting certain inaccuracies slide such as the cartoon being 'easier to read', you are missing the point somewhat.
The topic is not so much what tools and methods were used in revamping, it is not such much how characters are revamped, nor the devices used to do so, but which accomplished their goal more successfully, a goal both share.
For example - while the shotput and the 100meter dash are both sports events, they require extremely different training and different methods of participation. However, if one where to ask, "who is better at their event? The guy who got a gold in the shotput, or the guy who got the bronze in the 100m dash?" the answer is clearly the shotputter. The question is completely unconcerned with the actual elements of the sporting event that has been participated in, rather the result of the athlete's exertions as pertaining to their success within that event.
So, in this case, the question is not who did better with what tools - for example, the Ultimate comics are less likely to be cancelled than the DC cartoons, while the cartoons get more episodes per year than the comics, and the episodes are longer than their comic counterparts - but rather, the Ultimate universe reimagined several dozen Marvel character that have existed for decades. The Timmverse universe reimagined a similar number of DC characters which have also existed for decades. Regardless of the style in which they are presented, who did better with their treatment of the original subject matter?
It's not about how the story was told, but which story was more enjoyable to experience, which created a greater appreciation for the revamped character (either through glorification or parody or tragedy).
A major difference in revamping, inherent to the media, is that a single episode of the cartoon is about twice the length of a single comic. While this is, of course, an advantage for the cartoon, since they can spend more time developing characters than the comic, this point is actually completely inverted in this case: the Ultimate universe spends far longer on any single story they tell, than the average cartoon. 6-part arcs are normal for the Ultimate universe, and a 6-part arc would be a triple bill of episodes for the cartoons.
The only other thing would be to imply that one form of storytelling - say the cartoon - is inherently superior and capable of telling better stories than the comics and therefore it would be unfair to judge the two in comparison - which is of course, absurd.
So we're discussing the
quality of the revamps, not the
methods which are used, and therefore, comparison on that level is perfectly fair and reasonable.
At least, that is what I think.