Even among yourselves there will surely be differences and variances.
Or should I use ‘you’ here?
Answer
Yourselves here is OK in colloquial use, but formally incorrect.
Reflexive pronouns (myself, yourself, yourselves, himself, herself, itself, ourselves, themselves) should be used for an object (direct or indirect) which is identical with the subject of the verb.
In your sentence, the subject is the dummy adverb/pronoun there, so yourselves would be improper here. The object should be you. Yourselves would be proper if you changed the subject to you. For instance:
Even among yourselves you will surely encounter differences and variances
Attribution
Source : Link , Question Author : Soulz , Answer Author : StoneyB on hiatus