xenforo vs mybb whats better?

Best and Better are hollow references.
Your "Better" needs reference.

What are your looking for, what don't you like on your current choice, what are your preferences, where are you going to use it for, etc etc etc etc.

There are tons of comparisons on the internet where you can find the pro's and cons for your PARTICULAR situation.

Personally I would lean for mybb, you will have more help with mybb (with the communit, and a lot of things)

I would go for xenforo over mybb

Xenforo I like system and Dev team move for Vbulletin

Xenforo is fast speed I Like

There is a party going on the 6th floor.

HI ,
mybb is free but with limited features and not good looking ui.

For xenforo, it is good with more products available and you need to either purchase or use nulled one...

I used both of them, XenForo is faster, easy to use and more comfortable for users.

I would like to vote for xenforo...

i have never used mybb however, i can vouch for xenforo, its very solid and simple to use and there are many addons which further improve it