Both of these movies feature Ron Howard and a lot of car stunts/action, believe it or not. Both movies also come with more extras and details than I expected. There are some cool interviews with Ron, his brother Clint and father Rance (both were in both movies), and Roger Corman. It was really interesting to hear how and why these movies were made and Ron using them as a launching pad for his career as a director.
Both movies are light, fun, and well made. I won't pretend that either one has incredible depth, but that isn't what you're buying a ticket for. Eat My Dust has a lot of fun stunts even though you can tell it was made on a shoestring budget. Grand Theft Auto has a lot of laughs, with some great performances by the uptight fiancee and the increasingly nutty radio DJ.