Realistically mining is kind of a moot point since neither community has been compromised yet.
Yes, Bitcoin has come close to being compromised, and is at risk of it, and yes Monero's network is hypothetically easier to compromise as far as hash rates but really in both cases it's impractical to do a 51% attack.
It all comes down to game theory and indeed asic mining works since there's incentives and the cost to run at play the problem is when the state intervenes, i.e. China was number one until it was banned, it would be much more decentralized by now if not but nowadays the incentive is for blocks to be made in the US™ and that sets a dangerous precedent, meanwhile on Monero it's harder to ban and easier to run from anywhere but also like you said brings the question of how easy it is to spun up the 51% needed of CPUs
Mining is probably one of those things we'll never know the real answer to since to know what's most resilient we have to wait the a very powerful force to attack it but it could never happen, or like some bitcoiners say the state will stop existing and those problems won't exist anymore, who knows
