Starduster v$ Eagle

It started with building a long driveway... two airplanes
have already landed on it, and I who never even thought
of kitplanes before am now thinking of building one.

Being kinda lost with all the available types, I have
noticed large differences in prices, such as between
the Eagle-II and the Starduster-II, though a few
others are now bookmarked as well.

Is it a matter of metals, wood, craftmaship, or
mass production?