Autodesk has a site where you can compare AutoCAD products, applications and suites:
http://usa.autodesk.com/compare-autocad-products/. Select up to 5 products to compare and you can filter to narrow your choices to General Design, Building Design, Infrastructure Design, Product Design, Factory Design or Plant Design.
And here is what it look like when comparing AutoCAD vs AutoCAD LT. Compare prices and features to easier find what AutoCAD product fits you best. Finally there are buttons to try or buy any of the products.