Old's cool new's kewl*

I know sod all about BMX bikes but I know that Art's is older than Tilly's and I know that there is such a thing in BMX as old school and new school.
Two pix joined - they would crash if they were this close. They did crash in fact: They got too close.
Happy birthday bro. 50 - how did that happen?

* "The stupidest possible misspelling of a word in existence. Not only is it wrong, but it is also harder to type than cool".
urbandictionary.com