iLounge has posted a set of two new high-definition hands-on videos of Apple’s iPhone 4 today, one focused on the externals of the new phone by comparison with the original iPhone and iPhone 3GS, and the other on its new software and interface. The first video is a comparison of the iPhone 4, original iPhone, and iPhone 3GS (YouTube HD link), showing the final, working phone from all angles. It’s also available from Vimeo. The second video…