you can grab revisions from wpdb with smth like
$revisions = $wpdb->get_results("select * from {$wpdb->posts} where post_parent={$post_id} and post_type="revision"")
after selecting a revision you could use some js diff tool like
you can grab revisions from wpdb with smth like
$revisions = $wpdb->get_results("select * from {$wpdb->posts} where post_parent={$post_id} and post_type="revision"")
after selecting a revision you could use some js diff tool like