I went to both years ago, and did enjoy LCM better. The difference is that LCM was ectremely hands-on. They had all kinds of rare machines out on the floor that you could just...play with. Imagine using an original Lisa running XENIX of all things, then firing up MazeWar on an Imlac.

CHM is very well done but more of a traditional museum with limited, curated interactivity.