Amelie Solja

Doesn´t she play Anti instead of long pips?

Yes maybe.  Similar effect.

What is the difference of effect between long pips and antispin?

Not too much.  The balls that comes off them look like the same.

I would say that longpips still have a sort of variation and own-spin creation ability (depending on the exact model),although it is very low compared to inverted soft rubbers.
I have noticed that when I chop or push a backspin really hard,I can stop the backspin or even creating back some little amount of backspin.
With antispin...this rubber is,according to my limited experience,simply dead in terms of spin.
Those I had the opportunity to try were simply spin-deaf and I was able to return different spins just by adjusting the timing and stroke speed.
It was strange feeling because when I tried to drastically change the stroke,I missed.
It is not really possible to close your bat with antispin,making it a complete mirror.
Thus,antispin is exactly as effective as your opponent's spin abilities.
Longpips can still give the player a sort of own power if you really know how to use them.
Also,longpips are I would say still quite lively,since they mostly use normal sponge.
But antispins often use a slowdown sponge,which is not used with other rubbers much.
I have seen players who bought this sponge alone and glued it under OX longpips,I have even played against such a player.
Such a longpips rubber is really very comparable to antispin.
They are also equally quiet.
If you play against it more,you'll notice that antispin balls have their own specific sound,but I am unfortunately not really able to describe it.

Antispins have also one side-effect on the player: antispins are usually so extremely slow that such a player must play close to the table else he would be unable to send the ball on the table.