Which is better, IPB or Xenforo?

[Chrism13]

Hello friends, in the market, topics like this are quite abundant. Forums are not as popular as they used to be, but I have a forum project, and I am experiencing a lot of back and forth between these two systems. Therefore, I wanted to ask you. Additionally, IPB has released versions 3 and 4. Actually, version 4 has been released, and in my opinion, they have completely transformed the system from IPB 3 into a new one which I really like. However, for me, appearance, functionality, ease of use, and SEO are very important. Moreover, it should allow me to have full control over the forum's appearance and should have a wide range of add-ons. Putting these aside, do you think I should use IPB 3, IPB 4, or Xenforo? NOTE: ONCE THE DECISION IS MADE, A LICENSED VERSION WILL BE USED.