Hi, rellis.
I'm not going to be of much help as I normally dislike eggplant. [Shock! Horror! Dismay!]
But I do notice that both of your selections, Fengyuan Purple & Pingtung, were developed in Taiwan, where I spent many years. My wife and son love, love, love Taiwan's eggplant. My wife says Ichiban is okay, but not as good as eggplant grown in Taiwan.
Hope this helps.
Zaijian.......Xin Nian Kuai Le!
Michael