I have never personally met a chi with the same kind of energy and drive as a nice papillon. Even the well bred ones I've met there is just a very distinct difference between the breeds' energy and temperament. I know Michiyo has a chihuahua too and has experience with them.
Nia sounds like Mia in that she's a higher energy girl who needs quite a bit in the way of exercise and work to do. That's the type of papillon I like but there's a variety out there.
We have 2 Chis in the family and neither is quite like a Pap. They are stubborn! Less prey drive and less toy drive. They can be quite energetic but really lack the endurance of Paps. Nia can play fetch for like an hr straight and still want more but our Chi will be extremely tired after a 1 hr fast walk.
Also our 2 Chis are more snappy it seems. Nia has never ever snapped at me or any other person. when she's unsure, she wags like crazy and sort of hides behind me. Our 2 Chis when they're not confident either will snap, or growl and bare their teeth.
I feel like Paps may be friendlier in their attitude than chis but it could just be the individual dogs we have.
I think Nia is really a mixture of Summer and Mia. She doesn't quite have the energy and restlessness of Mia but she is pretty high energy. We do usually about an hr walk with an hr fetch a day at the least. She has great toy drive and quite a lot of prey drive too, however she's not really like Mia's level of prey drive I don't think. However, I've never actually met Mia or gotten the 2 together (although I so so so wish we could).
Nia is DR as well but not really in an aggressive way, she looooves dogs but she doesn't have enough confidence to greet them and play, instead she barks at them really loudly and wags circles around them. But once she meets a dog 2-3 times she's really good with dogs and loves chasing. She loves people but doesn't love them as much as Summer. She also really bright and follows commands extremely well.
Cavaliers in my opinion are a lot less prone to DR, DA and they tend to be pretty confident dogs. They're probably some of the friendliest and best temperamented dogs I've ever met.
I do like Westies but am not too much for the ever growing coat that need to be stripped or cut. Although I don't think JRTs are for me, I admire a lot of them. They're louder than what I like though lol. I've met a few JRTs that are making all sorts of weird noises while they perform the commands you ask.
Cresties really aren't for me. I'm scared of the hairless ones and not sure what to do with all the hair of the powder puffs lol. I love their build though. I have to say I've only ever met 1 Crestie so my mind could change.