That's interesting - they've taken a tent peg and modified it to be usable as a trowel which is twice as heavy as the Deuce#2 (which can also be used as a tent peg anyway...)
It's beyond interesting - it's amazing. Otoh, there was no 'Deuce 2' when the chap came up with his idea and he wouldn't have known he wasn't saving 19 grams.
There is also the question of price. The peg is £4.52 on eBay, corks are free and the Duct tape to bind it on is dual purpose for a cycle camper.
Each of the 19g saved cost 84p. Bargain!