to answer your question
who is going to end up with sasuke : no one knows but its kinda obvious if kishimoto wanted to pair him with anyone it's sakura
who have more fans : Sasusaku
they are far more famous and loved couple than sasukarin.
in Japan Voting Sasusaku always took the 1st place for boy\girl pairing in naruto . Sasukarin never reached top 20 .
who is better : Sasusaku they had bond even for sasuke character sakura did have impact on him more than once for sasukarin
sasuke only cared for karin once when she saved him and he thought of team 7 as team taka .
sasukarin more like a crack pairing just like sasuhina sakusai etc.