Lesson one : The chip circled in Red on the Pi is surface mount (a SMD - Surface Mount Device). The chip circled in blue is what used to be standard many years ago - a through hole chip mounted in a socket which is soldered on the reverse side with the legs of the socket going through holes. They are relatively easy to mess around with a soldering iron and cheaply available stripboard or home made circuit boards. SMD needs specialist gear that a hobbyist isn't likely to have (or even afford). In a mass production environment, the SMD lends itself to automation and hence cheap to produce in quantity.