I can see only one good reason to choose iPhone 5 over Nexus 4: The LG-manufactured mobile is sold out, and you can't wait. For the patient, Google's fourth-generation stock Android delivers rewarding experience. The new Nexus is the smartphone to buy this holiday season -- if you can find one.

Two reasons stand in iPhone 5's favor, neither is good, just necessary for some people: Your carrier -- for example, Sprint and Verizon in the United States -- isn't supported (Nexus 4 is GSM/HSPA+), or you bought heap loads of apps from Apple and don't want to lose your investment. I feel your pain, but offer no pity. Nexus 4 is exceptional.