Can anyone please tell me how do these rubbers compare in terms of speed, spin, control and durability thanks!
I think I mentioned a few things about Rozena en and Nimbus Delta S yesterday. Rakza 7 (used by quite a few over here) is harder than both, and I'd say slightly faster than Rozena. R7 is spinnier than Rozena, probably also a tad more than NDS.
Those playing with it that play 2-4 times a week usually change it every 3 to 6 months, I'd say that's par for the course. Some players hang on to their rubbers longer, but they seem not to care that much about the performance degradation that comes with wear, tear and factory-tuning evaporation.