I'm so glad that she ate her dinner! That's a good sign! Definitely continue to spend as much time as you can with her. :) That's so cool that she started chatting with you, too!
So I have had both an unnuetered and a neutered male. From my experience, the males are quieter and shyer than the females. The females seem to have more energy and are more eager to explore while the males seem shyer and more cautious. Beyond that, I haven't noticed much of a difference.
A neutered male shouldn't smell worse than the female, but they may mark more. One thing to be aware of is that all males will mate with the females even after they're neutered.
Everyone says that unnuetered males smell worse, but I never noticed much of a difference. If you have questions about the nuetering process, I'm happy to chat about that. :)