The GoodThe whole concept of trying to mould a clone into the exact replica of its original is a wonderful spin on the revisionist history sub-genre of sci-fi and Suekane's all-business take on the matter tackles the topic boldly. The school itself, St. Kleio Academy, is a bizarre and interesting setting reminiscent of Utena's Ohtori Academy that's rife with intrigue around every corner: if the shadowy conspiracy that's secretly threatening the entire school doesn't pique your curiosity then perhaps the administration willfully raising not only the most accomplished leaders from history, but also some of the most dangerous will. Add to that a rising cult among the clone students and you've already got a rather eventful first volume.
To me, the aspect that gives Afterschool Charisma its clout is that of fate vs. self-determination and how the administration handles clones that deviate from their path. The clone students know full well who they are and what their predecessors' personalities were, but they seem either to wallow in uncertainty that they're on a parallel path or they embrace their past greatness and let it go to their heads. An example of the former is Queen Elizabeth I, who realizes she has no nation and thus no purpose, while the latter can be seen in Mozart, whose elitism can even manifest itself in violence against non-clones.
The BadAfterschool Charisma is not what you'd call a quick-paced manga. In fact, it's plodding in all but one area: character introductions. I lost track of who was who quickly and found myself flipping back pages to where a clone was introduced. A lot of this is due to Suekane's art style that essentially takes one facial shape and uses it over and over with only different hair (or, in the case of women, that and breast size) to delineate characters.
If you're a stickler for historical details like me, you might also be peeved by the irregular naming conventions. Some characters are always referred to by their full name, which is unnecessary after the first introduction. I mean, "Florence" is not a terribly common name, there's no reason to say "Florence Nightingale" repeatedly. Then there's the habit of the author to name the characters using their adult names and titles: Marie Sklodowska only took the name "Curie" after she got married; Xiao-Qin Xian became Empress Dowager Cixi after slowly progressing higher and higher through the Qing royal court. These don't ruin the story, but give manga readers a bit of intellectual credit for being able to figure out who these people are.