It can be difficult to tell the difference between the plastic and metal one, this page is here to help
For those with a small digital scale the original plastic throttle is lighter, the newer beefed up version is nearly double the weight.
2.6 oz plastic
4.3 oz alloy
Newer aluminum one is also bit more glossy and the logo is larger.
See below for difference.

For those with a small digital scale the original plastic throttle is lighter, the newer beefed up version is nearly double the weight.
2.6 oz plastic
4.3 oz alloy
Newer aluminum one is also bit more glossy and the logo is larger.
See below for difference.