White gold and platinum look very similar, however Platinum wedding rings will not fade in color while gold may begin to turn a yellowish color over time. Although platinum is a durable metal, it will get scratched easier than gold will. Platinum rings are more expensive then gold rings. Platinum rings are also much more rare than gold and therefore there is prestige with owning one.
White gold complements bright white diamonds better than yellow gold. It is also more durable and scratch resistant.
Yellow gold has been a popular choice for wedding rings historically. This color gold is the least maintenance and it a good option for those with sensitive skin.
Rose gold is very durable due to the copper and is a tougher metal than yellow and white gold. Copper can cause allergic reactions in some people. Rose gold diamond rings are very in vogue right now, but they are not as widely available as the other metal bands.