Apart from cosmetics and being bolted onto AutoCAD, how to Revit and ACA differ?
dJE
the differences are immense...
ACA - NOT really parametric, much easier for 'autocad' based brains to wrap their head around
REVIT - Totally Model driven, no blocks, yet part 'families' such that a single door or window for example can display and posses all possible variations of that particular model of door or window.