Here are all the things I've noticed from owning 4 original iPhones and 4 iPhone 3G's. Also, I've seen a lot of iPhones as most of my friends have them, so I've grown pretty familiar with their strengths and weaknesses. Here are my findings. Enjoy. I've made my post color-coordinated to label the positives and negatives of each phone. Green = Positive Red = Negative Black = Neutral Original iPhone: The Back: - Doesn't crack but, it will dent if hit hard enough. - Feels great in your hand - No smudges or fingerprints - Heavy duty feeling - Headphone jack is recessed (only works with a limited amount of headphones without the use of an adaptor) - Plastic antenna cover feels flimsy or cheesy (also looks like it doesn't belong) - You can feel where the plastic antenna cover and the aluminum meet. - The body of the iPhone is slightly narrower than the 3G. - The matte finish on the back makes it slip around in your hand easier (easier to drop) The Screen: - The glass actually feels different (this is hard to explain) - Virtually no light leak - Dust cannot get under the glass because the digitizer is glued to the glass - Harder to replace if you smash it (also more expensive) - The screen is calibrated to a whiter (cooler) profile - The black areas are a little too deep (negative black... blacks kinda shine at you) The Buttons: - The home button has a deeper click feel - The volume, silence and power buttons won't scratch - The silence switch won't break off because it's made of one piece of plastic Reception: - Gets worse reception than the iPhone 3G (usually by only 1 bar I've seen) - Can only pick up EDGE data Misc: - Call volume and ringtone volume aren't as loud - Dust can build up in the speaker holes - Much harder to take the iPhone apart for self repairs - Compatible with FireWire for charging - 3.0 Users won't get MMS or A2DP - Comes in only Silver color - Longer battery life 10 Positives 14 Negatives 3 Neutrals iPhone 3G: The Back: - The plastic cracks and scratches easily - Feels great in your hand - Easy to smudge or get fingerprints on it - Not as solid feeling as the metal - Headphone jack is NOT recessed (works with any headphones) - Unibody back is a lot better than the 2-tone back of the original. - Glossy finish on the back lets it stick to your hand better (less likely to slip out and drop) The Screen: - A little wider than the original iPhone - Gaps between the metal bezel and screen can cause light leaks - Almost all the iPhone 3Gs I've seen have the glass raised on at least one side - Generally brighter and the blacks look a lot better - A slight yellow tint (I actually prefer the yellow over the blue tint) - A lot of 3Gs have scan lines (some people will know what I'm talking about here) - Glass feels a little different (again, hard to explain) - Dust can easily get under the screen The Buttons: - Being all chrome, they can scratch easily - The silence switch has been known to fall off some iPhones (it's only glued onto a pice of plastic.) - Home button feels squishier (doesn't click as hard) Reception: - Great reception! - Gets 3G and GPS signals Misc: - Call volume and speaker volumes are louder - Dust won't likely clog up your speakers because they've got a metal mesh on them - Much easier to disassemble and repair screen issues (even get dust out!) - Won't charge on a FireWire cable - 3.0 will enable MMS and A2DP (Apple says that this is due to hardware differences between the 2 models) - Comes in Black or White colors - Worse battery life (mainly due to 3G and GPS) 12 Positives 11 Negatives 4 Neutrals And there you have it. The pros and cons of both devices. The original beats the 3G in some areas but, the 3G beats the original in other areas. I guess it depends on what you're willing to live with with (features vs. build quality). I have a hard time deciding which iPhone I like better.... Hehe, I'm always switching back and forth (but I can because I have both... heh). I hope this is educational for everyone. The reason I made this list is because I've experienced both iPhones a heck of a lot and I picked up on things I've noticed.