Hi, there are quite a few rubber in the Rakza series: 7, 9, X, Z, XX
I’ve heard 7 is Jack of all trades,
9 is like Tenergy 64, low throw angle and fast
X has the highest throw angle(?), also the hardest but most grippy being non-tacky
Z is hybrid
XX completely new, know nothing about...
If you know more about the rubbers feel free to comment and enlighten me and other visitors
It depends on what rubbers you are used to. I like to talk about rubbers in comparison to each other. Otherwise it is kind of a meaningless discussion. For example, what is the definition of jack of all trades?
So I have used Rakza 7 soft, Rakza 7 regular, Rakza X soft and Rakza X.
I have played the most with Rakza 7 soft and Rakza X soft. In fact, Rakza 7 soft is one of my three main rubbers on my backhand (the other two being C-1 and Xiom Vega Asia right now).
Top sheet is not tacky but very grippy. One of the best ESN top sheet out there. The other ESN rubber top sheet that is as grippy as Rakza is G-1. For example, I am fooling with Xiom Vega series right now and its top sheet is not as grippy as Rakza 7/X and G-1.
Top sheet is very durable. You can get many months play out of Rakza 7/X regular/soft.
Sponge for the soft version is very soft but springy and catapulty. I would say Tenergy fx series has the most catapult effect. Revolutions series follows that. Then the next set of catapulty rubbers would be Rakza 7 soft and Rakza X soft. So Rakza soft series are more catapulty than Xiom Vega series, Rasanter series and Fastarc series.
Rakza 7/X regular compared to Rakza 7/X soft, is a bit like Tenergy 05/64 regular compared to Tenergy 05/64 fx. Harder sponge so top speed is more powerful. But at lower impact, the soft/fx version actually shoots the ball out faster. So it depends on what you like! I like the soft versions right now on my backhand.
I feel that Razka X is slightly faster and has therefore lower throw angle than Rakza 7. They are very very similar rubbers. My hand will take less than two minutes to adjust between Rakza 7 and Rakza X.
Rakza 9, I heard, is harder and not as popular. I have not bought a sheet of that at all.
Rakza Z, please see TensorBackhand's review.
Rakza XX very new. I have no idea either.