Fastest Moving Ranged Auto-attack?

So I was trying out Xayah the other day in the practice tool (I don't play very many marksmen, and I haven't practiced the ones I actually play for a good bit), and in retrospect I didn't really notice just how fast her auto-attacks were moving. Maybe it was my imagination but I thought they were traveling pretty fast compared to the autos of other marksmen ADCs. For the first half of my League career (I guess you'd call it) I got trapped into the niche of playing support all the time so I've seen quite a lot of the majority of marksmen in the laning phase, and I feel like I have a pretty good grasp (on a weird subconscious level that is) of how fast every projectile auto-attack travels. Maybe I just don't notice the difference on a conscious level but yeah...

So here's my question: Do all ranged projectile auto-attacks travel towards their target at the same speed or not? And if not, then which is the fastest? Keep in mind I am not talking about Attack Speed or the auto-attack animation, and I am not talking about other ranged champions classified as marksmen with instantaneous auto-attack damage like Azir.

Thanks