The yellow one will probably be pretty hard to start, excite the alternator to run the electronic ignition and keep the lights lit at stop lights without the battery. And I'll bet the radiator under the seat is pretty comfortable also. (darn technical people, always raining on stylists parade)
That Cafe Conc is on the other Forum....interesting discussion about the single sided swing arm....
http://forum.cog-online.org/index.php?topic=46108.0