Hip Hop Skid Bikes / Hipster Sleds / HHSB

If i am not wrong the top tube isnt the difference, its the head tub angle.

both geos here:
http://mashsf.com/cinelli_page/

yep. tube length almost excactly the same just head tue angle diff. shorter WB.

The Bolt has a lower bottom bracket too. Without having ridden either, I reckon the Bolt would be much nicer-handling.