Which dioamond ring should I buy a solitaire diamond ring or a diamond ring of small diamonds of same carat weight?

Buy which ever one YOU like! Everyone has a personal preference.

Personally I prefer smaller diamonds ring or three stone rings.

You can view a great collection of three stone rings at below websites and reduce your confusion :

B2CJewels.com

Zales.com

JewelryCentral.com

Large diamond solitaire will retain its value better than the ring with more but small diamonds.

But in the end of the day it's a personal preference, some people like the traditional, classic look of the solitaire but other like to have more diamonds and opt for a three stone or a ring with various side stones.

Shenoa Diamonds