Most people in venture capital have met Sir Ronald Cohen, the founder and chairman of Apax Partners. And many have met Steven Koltes, founder of CVC Capital Partners and head of its German office. But how many people have met them both together? The theory in private equity circles is that Koltes and Cohen are one and the same. For confused readers, Cohen is the grey-haired chap in specs with the winning smile. And so is Koltes.