The difference is that with an Obama presidency, conservatives will get off their butts and fight tooth and nail, everything he does, just like Clinton.
With a McCain presidency, conservatives will take it in the shorts because they will be compelled to stay silent, lest they break the 11th Commandment, just like with Bush.
So, which do you prefer?
Given the choice, I prefer to have conservatives standing up and fighting instead of being cowed into silence by 'their' party.
The answer is no. They wouldn't be with John McCain either.