Well at least you're not asking for much
Pushing: A bit like inverted as it keeps low and goes where you aim. Push too hard against backspin and it will go over the end, probably coz the topsheet is so hard. Pushes a little backspin but are slow and easy to place.
Chopping: Away from the table I could chop quite well against loops. it did not feel like there was a ton of reversal, but you basically get more backspin by brushing harder, but not the added backspin you get from some LPs.
Blocking: This is where it shines. Although it feel (and sounds) like you're play with a piece of cardboard, the control is excellent. It is very slow (probably similar to the slower LPs on todays' market) and quite insensitive to spin. Ball come off quite low with a little reversal. It is easier to place the ball then it is with any LPs.
Attacking: Well I could not attack backspin like I can with LPs.. there is just not enough reversal at low impact. However you can actually lift the ball to attack very much like a slow inverted rubber. This works very well against low backspin, no-spin or topspin, all producing just a little topspin. I did find the angle a little sensitive, probably coz the hard topsheet again.
The thicker sponge will probably make it slower and easier to attack, but reduce the ease of blocking and spin reversal.
I only tried red and would expect black to be a little gripper perhaps.
Hope that answers at least some of your questions
