Shuguang 845B or Psvane 845 Hi-Fi series tubes

My amp is Mastersound 845. I've been using a pair of Shuguang 845B tubes. After 2 years (probably about 2000 hrs) one of them died. I don't see many Shuguang 845B on Ebay any more, they were quite good. There are some "new" constructions though ... Psvane 845 Hi-Fi series , about the same price as Shuguang 845B (note, these are not Psvane 845-T). How are the "new" Psvane 845 Hi-Fi in comparison to 845B?

Thanks