Perform better in what way? Sticks have been made for years, so a newer model will seem to be more responsive than a really old model and probably have more memory for channel storage and buffering. Since your router is right next to your TV I really think you should get an Ultra and use a wired connection. You'll avoid Wi-Fi headaches, overheating issues, underpowered issues, and won't be beholden to Roku if you need a new remote.
When it comes to streaming my oldest Roku performs every bit as well as my newest, but then I don't care about 4k or any of the elaborate audio formats.
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