Try the search function of this forum and feed it with the names - read the results. In case you don't find much information it could be that most people here simply use other filter brands. For a reason: quality.
Read up more about the topic of photographic filters and the most common side effects when using them: filter flare and reflections / ghost images. The decide which way to go. But it's the same with many other things: either get something proper or don't waste money for cheap stuffs.
A very good UV filter test.