Not to put words in Cloudvalentine7's mouth, but I think that the significance in the two images is power & speed (gas burning choppers vs electric scooters) & freedom (no helmets vs helmets).
Honest question - what do you think Easy Rider (you obviously have no idea how to spell - two words, btw, capitalize the R) was about? No pressure, no wrong answer, what do you think it was about?
Me, I think that it was about 96 minutes (that's a movie buff's joke, son, I made a funny). Honestly, it was about the counterculture vs the establishment and how, in the end, the man always keeps you down (again, just MY opinion, no right or wrong answer).