It probably more depends on what you’re looking for in a nib. Gold nibs typically have some kind of bounce to them. The Viper is a hooded steel nib so it’ll probably be a much more stiff writing experience. But I’ve heard Diplomat nibs are pretty smooth writers. In my experience, Sailor nibs have some feedback and can “sing” on the page.
Yup! I’ve only been into fountain pens for a few years but I use them every day for journaling, work notes, and most other writing I do.