I want to buy the Facepunch | Rates Mod,

1) What is added at the not Brand-free version? Something on the footer of every page of the forum? What exactly?
2) If I buy the branded version, can I change to the brand-free later by paying only the price difference?
3) Is there the feature to show the rates of topics, not posts?
4) If 3 is possible, can they be shown in the board index, and be sorted by rate? (by clicking on the header, probably)
5) I see that there are Custom Rates, with different values, this could be made like a rate system with stars? (To give ratings of 1 to 5 stars)
6) If 5 is possible, can I show total stars average on the post or topic? (even with some coding from me, after you tell me what to look for in your code)
7) If 5 is possible, can the number of votes be shown too? (example: 4.5 stars, 10 voters)

I am very confused, I am between the Facepunch|Rates Mod and the Post Ratings Pro mod and I don't know what to choose...

1. The copyright at the bottom of every page.

2. Yes

3. Yes

4. No

5. Sure

6. Yes

7. That can be done too, but you'd do it yourself.

What is Post Rating Pro?

Oops, I really need No. 4, so that members can see the best topics in each board, by sorting them. Because, it's not so useful to have a highly rated topic somewhere lost in the dozens of pages of old topics. It could be found only by search, IF the user understands or cares how advanced search works.
I don't think it is too difficult to implement, do you have any plans to do it? Or, can you point me to the right direction to do it myself? (for the No. 7 too)

Post Ratings Pro http://custom.simplemachines.org/mods/index.php?mod=2234 has the ratings in the board index, and sort by rating.

It's quite interesting. I'll add it at some point. In this case my time is quite limited, so coding this myself is off the table just for one website nor as soon as you make the purchase.