Having a far larger network hashrate makes Bitcoin much more resistant to 51% attacks than Monero. Bitcoin also has the advantage of being accepted at many more merchants than Monero (when the purchased item is over the xmr.to and Shapeshift transaction limits).
Ignoring the greater expense to launch a 51% attack, are there any other technical or unique feature advantages Bitcoin has over Monero?
How does Bitcoin price volatility compare to Monero? Can lower relative volatility be considered a technical advantage for a currency that is often help for a period of time before being spent.
Would a privacy focused user of both Bitcoin and Monero wanting to purchase an item costing 2BTC or less from a BTC merchant have any reason to pay with Bitcoin instead of Monero (other than for the purposes of saving the exchange fee charged by xmr.to)?
Can the Bitcoin protect the privacy anything that Monero cannot with regard to transaction or metadata?