He(Sid) is treated as the leader, but he himself doesn't acknowledge himself as their leader.
Ainz from Overlord just seems panicked most of the time and shows a general lack of confidence.
Sid on the other hand shows extreme confidence and enjoys trying to pose as a "background character".
The big difference here, is that Sid believes they (his followers) are all LARPing as well. He just plays along with them, because he thinks they are all just pretending to be "cool".
He has confidence and knows he is capable, as is his followers, but he thinks it is all for the sake to be cool.
The way the LN is worded, it makes it appear that he knows his power, but he doesn't care about helping or hurting people. He only wants to be cool in his own mind.
Which is quite refreshing imo as most MCs are goody-two-shoes cringe worthy failures.
The comedy seems basic, but continuous. I enjoy it, as he is always being selfish but is mistaken by everybody as selfless.
The "dramatic irony" is what is comedic, as we (the readers) say to ourselves, "if they only knew what each other was thinking".