there is no difference between 06 and 07 model,GL has got options of back wipers,and power side mirrors.regarding fuel average its around 14km/ltr witha c in busy traffic of rwp saddar and on long route it gives around 17-18km/ltr,this what i have calculated personally with my 2006 probox 1300cc. drive wise its good ,better than vitz,i vent driven civic so cant comment on that,i have GLI 2011 as well ,if i compare it with that drive wise,ill say its more comfortable.