Your memories are probably very similar.
( ( Your memories ) ( ( ( are probably ) ( very similar ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NNS memories)) (VP (VBP are) (ADVP (RB probably)) (ADJP (RB very) (JJ similar))) (. .)))
Your memories have many similarities. 
( ( Your memories ) ( ( have ( many similarities ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NNS memories)) (VP (VBP have) (NP (JJ many) (NNS similarities))) (. .)))