Smiling, I like both and each can serve a good purpose, but for every day use Volt is likely best choice.

A couple of interesting links (OK I know it is a from a foreign auto but I enjoyed working/driving these 30 years back)

http://mgaguru.com/mgtech/electric/et220.htm
http://mgaguru.com/mgtech/electric/et221.htm

Data applies to most any old amp or volt meter.

Baking in the nice desert sun, breathing life back into a 48 3800 5 window.