How does damage bonus and hit bonus and any other bonuses that I am probably unaware of work with enchanting weapons. Like the difference between +8 sword to a +9 to a +10 and so forth are there extra benefits for getting the sword to +12 lets say, other than the additional couple dmg points per hit? I'm not sure if I'm looking at it the right way, does anyone have any insight into this? Is there a chart or something?

Thank you in advance ! 

every + gives dmg, and every +2 gives 1 hit.

so the difference between +10 and +12 would be 2 dmg and 1 hit more on +12