Well, if you are very attached to a certain version, this will certainly happen. I mean, you have built a mental template of the work based on the recording, so you are probably going to be disapointed about the way they play.
Also, when in concert, you can't correct a mistake (in the studio you do it all the time); so you might expect a few wrong notes.
But, there is another factor to bear in mind. The experience of a concert is so different from the one one derives from a record that you will probably just love it.
Of course, the sound will be better - well, not better, reallly, it will be real sound and not opaque and noisy hifi stuff.
Perhaps you could try to go to concerts often, not limiting yourself to a particular repertoire. This will certainly broaden your appreciation of music.
But the main thing is: the experience of a concert is as much different from the home listening as real life is from movies.