Not a urologist, but I've got a bladder issue that has given me insight on this topic that I've discussed with several urologists.

In short: yes, penis havers piss slightly faster than non-penis havers. But only on average.

All sexes have a urethra, the tube in which pee comes out of, penises just contain a few extra centimeters of urethra on average, compared to non-penis havers.

These extra centimeters, on average, allow the piss to naturally "cycle" around the urethra a bit more, leading to a naturally higher velocity on exit.

To answer your question, there is a device that measures the flow rate of a stream of urine. This device is placed into a toilet, looks like a portable fan, and is pee'd on to determine the strength and speed of your flow over time.

It's used by urologists to determine if you're peeing good or bad, but 100% generates accurate information on the velocity / speed of your piss.

Not intentionally, but I did very well on one of these tests, literally pissing "off the charts" which lead to several conversations with my urologist on who the best pissers out there are. (Horses, Swimmers, Etc). Eventually confirming that men do (on average) pee faster.

Mine is rifled.

The velocity is proportional to bladder pressure and inversely proportional to the square of the diameter of the urethra. The shape of the body parts outside the urethra is irrelevant.

I’m going to just say this. I hear my wife pee sometimes and it sounds like a water faucet. She has me beat at least.

Likely slower due to the friction the fluid have to go through the length of the barrel. The benefit however is the accuracy it has and lower in decibel, as it act as an aiming device and a suppresor.

Now I'm sitting here wishing I had rifling in my barrel so the pee would come out spiraling like those nozzles on some power washers.

This is a toilet thought, please ban me mods.

Finally, a proper shower thought!

Time to harass my wife and compare speeds based on the sound of our pee streams. ✌️

I thought most mammals had basically the same time (where diameter scales with bladder size) from a full bladder. I'm not sure if I'm misremembering that.

pew, pew!

I have no idea but the next time I pee PEW PEW

No

Of course there are other factors (how full and how big the baldder is etc.) but I do wonder if the diameter of the pipe is smaller in a penis, and maybe less stretchy/flexible, compared to vulva urethra.

Mine comes all the way from my head so the pressure is intense.