the business modle of AAPL and GOOG is totally different.
GOOG is service business, which is no competetion there and it's customer base do not shift suddenly. So, it's down day will be recovered easily.
AAPL is a manufacture. If it can keep to make the best product and keep to stay in front far from other competeters, it's stock price can recover. Otherwise, it's life span will be short like rimm's.
Warret Buffet said: He did not understand tech company, because he never understand those company. Actually, he understand them very well.
For me, AAPL down might not be a good buy, but GOOG down must be a good buy in future (untill it lost it's donminant).