Not easy about the LDF, as in Lampung there's no LDF the last time I checked orz. Not even an AX99 lel. But they do hv AX88D and JPX CX, both of which I found it nicely balanced, but not for singles obviously (for me that is) as the swing speed is so fast, like my Arc 11 smhw Just to show how primitive my town is smhw, I wish I could try both AX99 and LDF smhw
I understand. If you are looking the stiff, head heavy racket for singles maybe you really should look towards Z Force 2 or Astrox 99 or similar rackets from other manufacturers. In my opinion LDF is more balanced option with little more flex and little less head heavy. But that does not mean that LDF racket is not powerful enough.
It is hard to judge. Every racket gaines some flex after some time so I would say 2019 edition is a little stiffer. I actually think it is same configuration and difference is just in color scheme.