"... Siena's thriving historic center, with redbrick lanes cascading every which way, offers Italy's best medieval city experience...for those who dream of a Fiat-free Italy..."
( Rick's Steve Italy 2008 book- Avalon Travel)
"...Siena was medieval Florence's arch rival and still these days competing for the tourists..." (Rick Steve's Italy book - 2008- Avalon Travel)
I liked all and personally I think we can't compare the two cities.
We were there at night and next time we will spend a day. I had the most delicious wild boar dish ever. Yummmmi! Memorable!