I would choose competence over charisma any day.
I suppose you don't realize that Ivy is an Industrial Designer who has a top team of Engineers (Mechanical, Electrical), Software Developers and Graphics Artists who do the actual work, right?
Jonathan is a good Manager and has an eye for style compatible with Steve Jobs.
Unless he shows me something as a Keynote speaker (He's never done one) this is all speculative PR.
Note: I've got some experience working for both NeXT and Apple, under Steve Jobs.
NO ONE GIVES A PRESENTATION AND VISION LIKE STEVE JOBS.
It's his Strength and a Corporation's biggest worry if he leaves.
Jonathan Ivy knows and understands the Vision of Steve Jobs. This Vision and Style, not to mention a keen eye for demanding something better out of his staff, is something you either nurture in your youth or don't.
Some say you're born with it. I believe such ability is innate but needs the environment from your family to see it and help it grow.
Ivy is best doing what he does best: driving his team to materialize compelling solutions.
They've got a long way to go to show that the company can break the 10% market ceiling.
CEOs are a unique breed. Most of them in this industry shouldn't be CEOs and some should that never get the chance.
No one becomes a CEO without the desire to be one. This desire tends to be born from years of frustration on not getting one's vision noticed and utilized.
Startups come from frustrated engineers and business personnel who were limited in their prior jobs.
Ivy is in an enviable position His team's work is constantly being implemented.