Royal Dwarf / Sweet Skunk Auto 3gl pot

Let me start saying that I started on soil Royal Dwarf ( RD ) last month 29th, and the Sweet Skunk ( SS) on the 30 th, RD came out on the 1st and SS on the 2nd. For this week not much, I gave the plants water every 2 days with nutrients. Royal Dwarf developed very fast from last week till today. on this video notice that the smaller one is SS, the RD with very big and fat leaves. I confess that I got a bit worried about the SS cause it was like to growing but, I guess it is taking her time.. RD I am starting some LST but nothing too serious yet.. Lets see for the next week how its going to be.. the height for RD is 10cm and for SS 6cm. PS> It is my first time growing,,