There is no such option of user to user response. You can't reply to any user's question or comment specifically, all you can do is write your reply in the comments box below. But they should add this option in the forum.
Well Surface surely doesn't have any comparison with MacBooks, but we can't overlook some of its amazing features and flexibility. I think for those who want a break from Apple products, Surface is a good option.
If you are not willing to buy Nokia Lumia then HTC One M8 is also a good option. It's some features may not be best in class but it can be a good alternative of Nokia Lumia.