Software business conference? Which one?

There will be two conferences in October that have almost identical name but are hardly the same by nature and content:

Given that the first conference is for "owners, chief executives, presidents, vice presidents and division or department directors of leading and fast-growing software companies" and has this list of speakers. And the second is for "managers, CXOs, directors or founders of software companies" and has such speakers on the list. Which one would you attend?