"Studying one opening" is rather a multitude of different positions.
Many positional ideas are common, and some (reversed) variations about similar, but I wouldn't say that Black has a hard time meeting the KIA. This is mostly because in the KIA white does not try to make something out of his first move development advantage, but he chooses a slow buildup plan instead.
So Im wondering if you have the ability to play one well, will your skills with that one translate to the other?
I would think players who enjoy the King's Indian Defense as black would be bored with the King's Indian Attack as white. The ideas are different. The KID seems much more dynamic to me.
What makes you say that PCCC? They look the same with equal oppertunities yet one is more dynamic, im not disagreeing I would just like to hear your reasoning.
It's probably due to the general (mis)understanding that the KID is the typical run&gun situation of the Mar del Plata/Classical variation, which at first sight looks like "Black delivers mate with some sacs, else his queenside goes down the drain".
That's why a casual KID player is at a loss when he meets something like the Makagonov variation, or systems with g3 (which is rather a whole family, depending on the placement of white's c-pawn), or the Saemisch, or the Hungarian variation.
The KID's main strength is precisely that it's a very flexible opening, allowing Black to apply several fundamentally different strategies, and for that very reason it's rather an inappropriate opening for low-rated players. It might bring points against weak opposition, but against a strong opponent it simply spells "trouble".
kid is fun
kia is boring(ish)
See post 2 in the following thread:
https://www.chess.com/forum/view/chess-openings/kings-indian-attack-and-kings-indian-defense
There are similarities.
Fischer played King's Indian Defence as well as King's Indian Attack
https://www.chessgames.com/perl/chessgame?gid=1044267
I tried the KID but no one was doing the main lines, so it did not work out. I did the KIA and got the right positions
in the KIA you are more likely to get an attack than the KID because you move first
How much of a difference is there between the two?
Does one take more studying of theory and pawn structures?
I'm just asking because if they are pretty much the same that gives you solid answers to the caro kahn, french, sicillian, pirc, english, bird, and queen pawn by only studying one opening.