You don't think hearing Jobs and Wozniak discussing the future of personal computers would have been all that enlightening? Did you watch the linked video? Wozniak explicitly refutes you. He says they discussed personal computers extensively and Jobs always pushed him to engineer ideas that other people weren't envisioning. He says that Jobs needed him at the beginning and that Wozniak owes much more after that to Jobs.
It's pointless to try to determine who was more important to Apple's initial success anyway. It's like trying to figure out whether the calves or the thighs contribute more to a vertical jump. Try keeping your legs perfectly straight at the knees and jumping with just the feet: You'll only get a couple inches off the floor. Now try keeping the ankle locked and jump off the heels with your thighs: You'll get a little higher. But if you take a full natural jump with your upper and lower leg, you'll jump far higher than the addition of both before. The point is, sometimes synergies just can't be broken down into obvious component forces.
It's pointless to try to determine who was more important to Apple's initial success anyway. It's like trying to figure out whether the calves or the thighs contribute more to a vertical jump. Try keeping your legs perfectly straight at the knees and jumping with just the feet: You'll only get a couple inches off the floor. Now try keeping the ankle locked and jump off the heels with your thighs: You'll get a little higher. But if you take a full natural jump with your upper and lower leg, you'll jump far higher than the addition of both before. The point is, sometimes synergies just can't be broken down into obvious component forces.