Common collector transistor
(1) Shows Rb is negatively biased less than collector   

(2) Shows Rb is biased above ground such that  Vbe>0.6   to be active
so (2) is more general purpose

Although are Thevanin equivalents, (1) is unconventional with notation and both lack a 0V symbol. (gnd)  Vcc refers to positive (Collector), Vee refers to -ve (emitter) usually gnd.