[x10guy]

Both are excellent phones. It is REALLY a personal choice.

Anyone who says definitely one is better than the other is just not informed.
Again, it really depends on what is important to you.

I was initially looking at the Diamond because of it's form factor.

But ultimately I chose to TP mainly because of 2 factors.
1. Expandable memory slot (the Diamond has a fixed 4GB memory with no expansion)
2. The Video-out feature. Not many people mention this but if you want to do simple Powerpoint presentations of the fly without a PC this is really a COOL feature.

Some of the Diamonds advantages:
1. Obviously the form factor - no keyboard gets rid of alot of bulk
2. FM radio (the possibly could get this in the future... but right now, nada)
3. a bit cheaper in price.