It makes sense that you may want this, but I don't think you'll get it - for several reasons (all in my opinion):
1. There's no such thing as marks out of 10, except in a highly artificial competition environment.
2. In freestyle, each dance, each partner, each song is different. You could have a deliriously great dance to a song one night, then dance (with the same partner) to the same track the following night and it'll all go Pete Tong.
3. Once you get to a certain level of competence, style and chemistry between you and your dance partner are more important than any other objective measurements of technique. Or rather, those factors drive technique. So it'll vary depending on who you dance with.
4. MJ is not highly-structured enough to make these sort of comparisons easily anyway...
Having said that, of course dancing ability does vary, it's not all subjective, and some dancers are better than others. So it's of course fine to try and improve your dancing, but I'd not try going down the "Marks out of 10" route - it's not that easy
The standard advice in these situations, I believe, is that if you want proper feedback on these areas, you've got to pay for it - i.e. private lessons and workshops, where you'll get a trained teacher telling you what you're doing wrong (it's more fun than it sounds).
Hope that helps...
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