There are many recording and broadcasting systems on the market now, but most of them are OEM dealers, and there are not many products with real R&D capabilities, which can be upgraded and improved for a long time. As far as I know, the better brands such as AVA, Zhongqing, Qu Rui and Hekefen are manufacturers, which can at least guarantee the continuous upgrading of recording and broadcasting. As for which is better, it's hard to say.