We had the exact same question & went with Coturnix quail. I'm no expert but here's our reasoning:
From what we read, quail have shorter life spans (1-2 years) so it seemed less intimidating/ less of a time commitment.
Quail start laying eggs sooner & the boys are full grown in 8 weeks so we could also have meat sooner. (No joke, they doubled in size way faster than we expected).
Because they're smaller in size, we were able to buy a smaller coop & run, so those were cheaper than the huge ones I want for the chickens.
All the chicken breeds I want are currently sold out so we have to wait until Spring before we even get the chance to get them.
As far as temperament of the quail, ours are super sweet, loving, curious, & silly. We got them as day old chicks & made it a point to check on them at least 4 times a day, talk baby talk to them, pick them up, & just stand there with our hand in the brooder. Now they are 5 weeks old & outside in their run/coop. When we go into their run, they come running up to us, climb on us, & eat out of our hands. We have become super attached to the little guys so now I'm not sure I'll be able to cull the boys for dinner. But I suspect the same will happen with chickens. I really hope most are girls!
Whichever one you go with, just remember that the first time is going to be a learning experience no matter what (just like raising a human kid). Wry neck was a terrible experience, read up on that just in case. Also, have a "sick bay" or miniature brooder ready, just in case a few need separating. Hubby & I remind each other that this is our learning flock. Mistakes happen, you're human & can't foresee every little thing, & as always in life - poop happens. Out of the 52 we got, 45 are still with us. I hope that helped a wee bit. Good luck!!