Palm Centro Vs. Apple iPhone Comparison Shots: With the attractive unlimited plan from Sprint, (and SERO plans) At&t’s iPhone is still missing corporate and student discounts which would lower the monthly carrier fees to competitive levels.  We picked up both devices to get an idea of how they compare on many levels, but let’s start with a visual comparison. Many people have asked for it and here it is: Side by Side comparison photos of the Palm Centro and Apple’s iPhone, enjoy. Check back for a full comparison review between the two devices later this week.