أُكْرِمُكَ إِنْ تُكْرِمْنِي
I will honor you if you honor me.
إِنْ تُكْرِمْنِي أُكْرِمْكَ
If you honor me, I will honor you.
Both express the same basic dependence, but a condition-first arrangement prepares the listener for a result still to come. A result-first arrangement states the principal content and then supplies its limitation.
The difference is not merely the number of words: it concerns the presentation and emphasis of the information, alongside the particular grammatical requirements of each construction.