A higher rise stem will be lighter than a Thomson
Really? by how much? How much do each of these stems weigh then? Even with all that extra steerer and all those nasty spacers that must weight, ohhh grammes….it'll make such a difference…
Yeah, you're right. It is only a difference of grammes, over 100g mind you. That's based on the lump of steerer you'd chop off weighing as much as the headset spacers.
I've not done any empirical tests. I have done some real world riding on them though (just like every stem tested in magazines), and a more direct route from the headset to the bars makes for a more accurate front end.
So I'm correct about it being lighter, and unless you can prove me wrong with your empirical tests I'm also correct about it being stiffer.
I love this forum sometimes.