yea they do look similar, however you have taken it one node lower, he has 5 leaf, you only have 3, it was your 3 leafs that was my reasoning for suggesting waiting....also not knowing your set up or how spot on it is, and therefore not knowing how quickly your plants will bounce back....
but as you say its your learning curve, its all good.
if unhappy with the hieght maybe an improvement would be to let them get to ten inches tall then chop down to the 4th node....the reason why i reccomend the 10 inches tall is to allow the seedling to establish a good root system, which is what its main objective is as a seedling,,,,as soon as they move from seedling to veg then the training can begin imo...
just a quick pick of my stems
Ls1
Ls2