I have heard good things about Cline! I'm curious to learn more. I need to try it out myself.
I see Codebuff as a premium version of Cline, assuming that we are in fact more expensive. We do a lot of work to find more relevant files to include in context.
Tbh I used manicode once about a month ago and much preferred cline. Cline seems to find context just fine, can run terminal commands in the VS code terminal, and the flow where it proposes an edit is very good. Since it's in VS code I can even pause it and edit files then unpause it. I like that I can see how much everything costs and rely on good caching and usage based billing to get a fair price.
Admittedly the last time I used manicode was a while back but I even preferred Cursor to it, and Cursor hallucinates like a mf'er. What I liked about cursor is that I can just tell composer what files I want it to look at in the UI. But I just use Cline now because I find its performance to be the best.
Other datapoints: backend / ML engineer. Maybe other kinds of engineers have different experiences.