You are comparing two different things
1) The corporate nerd-brain with the suit and tie whose life depends upon an email which he may receive to inform him that his buyers have not been able to meet his demands and have only purchased 500 tonnes of sesame seed and needs to forward the email to his boss immediately. Most people in this category also have a phone especially for voice.
2) the 18 year old college kid who loves his music, and wants to be able to listen to it wherever he wants, and is also a textoholic and has three different girlfriends he wants to call.
in short these two phones are aimed at entirely different markets, after reading article i still dont get why someone would compare the damn things and i dont believe iPhone is causing RIM any trouble or vice versa, they are two different things. I highly doubt RIM would ever make an iPod-esque phone or iPhone will ever boast a QWERTY//