I am using delphi as my primary development tool. 
and recently I found these 2 libraries in [KSDEV.com](http://ksdev.com) 

and i found they are similar to WPF . So i just downloaded them and stated to playing with them until the time to end comes ( i have not checked its license policies yet). I am not a good WPF knowledge person but i found was WPF hard to develop.

But my doubt is , are these 2 libraries can replace WPF in delphi . what are the drawbacks Dxscene and VGscene have or what are the drawbacks WPF have , 

There are only a little articles about them in internet (google gave me millions of results but most of them repeated 2 articles which was published in KSDEV)