The buttons where heavier, and it helps when your only competition has design flaws in everything causing them to fail after a few months.
I found it interesting how my warthog throttle and virpil throttle weighed exactly the same, people still seem to think, "It's heavy, it must be quality."
The warthog had double steel bottom plates with half a dozen lead weights attached, the rest apart from the stamped sheets on top of the grip is plastic and glue.
I've gotten less flex out things I've 3d printed than those throttle levers.