Well, you're asking a subjective question and you know that so take this for what it's worth.
Which one "pulls nicer".
I've towed both and in the strict confines of this question; neither.
A properly set up TT with a good WD hitch and sway control pulls the same as a 5th wheel for me.
My 35 foot TT crossed the entire continent with nary a twitch or wiggle. Side roads, interstates, tractor trailer passes, etc. Not a moment of white knuckle or even knowing it was back there.
Not ice I said "properly set up".
Where the two differ is in convenience. Both in hooking up and anything beside straight forward driving.
With a 5th, you back it into the foot and pull away (a bit oversimplified, but you get the idea). With a WD hitch it's line it up, latch, bars/chains, and pull away. Depending on you particular sway control, there can be a couple raise and lower the toungue to hook up the bars.
Backing up is pretty much the same. 5th - chuck the truck in reverse and back it in. Most WD hitches say you can back up, but the reality is pull up, unhook bars and then back in. If the rig isn't level or straight when you're done with a WD hitch, you're pretty much not getting the bars off or they're spring loaded to the point of dangerous.
Some say yo can cut a 5th tighter than a TT, but I credit this more to the driver than the hitch. I've backed my TT into spots guys couldn't go with a 5th and watched their mouths drop.
a 5th is overall shorter than a TT once hooked up, but you're got something like 6 feet up over the bed and now tongue length. No surprise there.
I've towed both, I prefer a TT.
But they both will pull fine once set up properly.
a 5th is just a bit more........ahem....."idiot proof"......than a TT when it comes to proper setup.
No offense intended to any of the guys out there that choose to "take the 5th".