First of all, you can and should post such stuff in The Rating Center
However, since you mentioned competitive battling, the rating center you should go to is the Netbattle Team Rating Thread
Now let's talk about your Gengars. The second one has a better Nature for sweeping (Timid = +Spd -Atk) compared to the first one (Lonely = +Atk -Def). So I would personally use the second one. Besides, Gengar has good Special Attack, and can pull off the moveset well. Destiny Bond over HP Dark, while both Giga Drain and Will-o-wisp are fine.