"What do the two above have in common?" Game

[Jyo]

For now: both have an underscore _ in their username

 

[Chidamari Sketch]

Both of their usernames end with the letter x

 

[progressforth]

They both have a theme to their avatars that they go by when choosing a new one.

 

[PaulTheProtist]

Both joined in a year that is divisible by three once you subtract 2,000 from it

 

[Caprizant]

^ and ^^ both have avatars that are not 120x120 and joined in May 2015.

 

[Berrenta]

Both have postcounts with a 5 in it.

Both have female characters as avatars

Hate to break this to you, but the character in Chibster's avatar is actually male. Then again, he does look somewhat feminine, so that may explain some confusion.

 

[Jyo]

For now, both have cute avatars.

Thanks @Berrenta; didn't know

 

[Chibster]

@Fire Fox; Don't worry, you're not the only one who thought that! xD

Both have cute quadrupedal beings as avatars.

 

[Steel_Justice]

Both have the numbers 3,9 and 7 in their post count while this post was made.

 

[Username19]

Both joined in 2010

 

[Berrenta]

Both have post counts that begin with 1 and contain a 2 and a 5.

 

[xXMelanie_HimeXx]

Both are females who live in America, have numerous blog entries, have their facebooks linked in their profiles, and have claims listed in their signatures.

 

[jackatlasred]

Bith are females that live in America

 

[pokemoll]

Both have only one social media link.

 

[Caprizant]

^ and ^^ both joined in northern hemisphere spring in a year divisible by 5, have real-world locations, have a single-digit number of blog entries, have Pokémon in their signatures, and stick to one mode of capitalization for their user titles.

 

[Rainbow Cloud]

Both have Tumblr accounts

 

[Berrenta]

Both joined in 2011

 

[Username19]

Both have a R, A, B, and N in their uesername.

 

[Jyo]

Both have over 1,200 post and love to claim

 

[Wispy Willow]

Both live in the US of A and have posts numbering in the thousands.