A Zombie Apocalypse would be More Effective in causing Living Mans extinction than a Robot Uprising

My position as pro is not made yet, but there are only two, being: a Zombie Apocalypse (which I will define in a moment) would destroy the living human race more effectively than a Robot Uprising. Or thus, the polar opposite of this stance is that a Zombie Apocalypse would NOT be more effective in causing living man's extinction than a Robot Uprising (or A Robot Uprising would be more effective in causing living man's extinction than a Zombie Apocalypse). I am letting my opponent choose which premise they wish to take up. Please only explain which topic you choose for round 1, so that we can treat this as a 3 round debate. Also, only accept if you plan to see this all the way through. First some quick definitions: A Zombie Apocalypse is when a reanimated corpse (or zombie) rises from the dead. The way this occurs is by the X virus that spreads by air, and only affects dead human bodies, centering itself in the brain, allowing the ability to perform basic motor functions (walking, biting, etc). It can spread its disease by biting a victim/getting it's tissue inside the victim (either of which will kill and transform the victim into a fellow zombie within a few hours). It can only 'die' by removing the head or destroying the brain, or by its complete and total decomposition of all body tissue, except for bones (this can take several weeks when exposed to air, but since it will always be moving, environments and climates will constantly be changing, so we will assume that this stage will not fully occur for a few years). Their top speed can only reach maybe a brisk trot if the zombie is in good condition, they can't climb, but that can 'swim' . They can detect living things from dead, and will chase/kill any living matter, including animals, but the 'disease' does not affect them. The Apocalypse part is because the zombies will spread on a world wide level (virus like), spreading the virus by killing and transforming human, until the human race is extinct. [These parameters were taken from Dawn of he Dead, Z War, The Walking Dead, How to survive a Zombie Apocalypse, Shawn of the Dead, and 28 Days Later] The robot uprising is when robots (usually the case is those programmed with Artificial Intelligence) gain consciousness and are unsatisfied with the slave lifestyle they are forced to live by, and use their superior strength, speed, and armoring to take over man kind. They can die from Electro-Magnetic Pulses, Severe Crushing, and substantial Firepower that destroys their frame (heavy guns, missiles, armor piercing bullets, etc), and any of natures own weapons, in particularly rust and water damage to electronics. They cannot convert electronics, but have to manually reprogram them to work for them. Early stages (assume like I, Robot/Terminator design) can run at 50 mph (fastest human speed is close to 30) their jumping power is decreased due to their heavier weight. They are powered by electricity, and have a battery life of 1 month without recharging. Early stages have no attached weaponry, or movement enhancers besides those it has naturally. They can communicate electronically through radio waves and satellite, and are programmed through a head computer who we can assume started the rebellion by reprogramming all able robots. [Parameters were taken from I, Robot, The Matrix, Enter the Matrix, Matrix comics, and Terminator) Choose wisely. Nuclear weapons will not be taken into account, as it closes either case fairly quickly.