Vlk
2
The detection rates are absolutely the same. avast! Professional Edition adds some extra features.
Here’s a comparison table: http://www.avast.com/i_idt_1018.html
Also, avast! Home is free only for home, non-commercial use. That’s why people buy avast! Professional in most of the cases… (they like it at home so they want to keep it in their offices as well).
Thanks
Vlk