How you consider 2nd edition vs SPK50 on terms of throw?
Sieger PK is unique high throw slow rubber and it works Perfect with fast low throw blades...
I think IT has very bad spin sensitivity
Just comparing the passive properties if you let a ball fall onto both rubbers, you will see the YRD2 having a higher bounce/reactivity, definitely. It is not on the level of a T05 or something, but at least on the level of Rakza Z or more linear tensors like G-1 i guess. So if the PK50 ball bounces 17cm, YRD2 was about 20-22cm.
I have taken half an hour to perform a few comparisions on a robot (with the help of spinsight).
The incoming ball was programmed like this: Ball to the middle (no serve), with a backspin of 3 (-3 setting on Butterfly amicus).
This resulted in a ball with 38rps (backspin) with about 16km/h speed. This was unchanged through all the following tests.
The first comparison was by just letting the incoming ball bite the topsheet and have a slight forward movement to guide the ball over the net. This is what i would assume a passive push/touch would be.
The PK50 passive returns would have around 32 rps of backspin, while the YRD2 had 30 rps on average.
Now i wanted to simulate a more aggressive push, which would have the blade totally open (meaning the rubber points straight to the ceiling) and chopping at the moment of contact to create extra backspin.
On the PK50 the spin achieved ranged from 41 to 55 only using the under arm (no wrist involved).
With the YRD2 the throw was different and i had to adjust the angle a little, because of the more reactive sponge the ball would fly higher over the net if i kept the same move from the pk50. The pushes i "counted" as valid had to be lower than 10cm over the net. The spin achieved ranged between 40 and perhaps 51 rps. When i deliberately used the wrist i could get 56 rps, but that would be a different technique than i tried with the pk50.
Next exercise was letting the ball drop from the table and hitting it at about table height trying to create as much spin as possible with the least amount of speed possible.
With the PK50 my most slow spinny shot was 92rps topspin with 18 km/h, while with the YRD2 i achieved 93 rps topspin with 18 km/h.
So you see the spin capability on an amateur level is quite similar.
The throw is definitely different and the PK50 lets the ball follow the trajectory of your blade more than the YRD2. I think the more reactive sponge is the "culprit" here.
All in all the PK50 feels more chinese due to the increased stickiness and better touch play. The YRD2 is definitely not a one for one replacement of the PK50, but in terms of achieving similar result without big technical change it might be interesting.
(Bold) Dragon from aliexpress, @ 23Euro, now I need to wait for 2-3 weeks to arrive. I chose the medium soft and going to be glued on a VKM (fh side).
