Our main competitor is Aeon-Retailers group. Their annual sales is around $30B, compared to them, ours is about $10B. However, we are totally different from each other especially on our origins. This means that they originally come from retail business and we've been doing real estate business for centuries. 聼起來自然嗎?

Almost perfect! I hate to edit it, but...

Our main competitor is Aeon-Retailers group. Their annual sales is around $30B compared while ours in comparison stands at about $10B. However, we are totally different from each other, especially on our origins. This means while they originally came from a retail business, we've been doing real estate for centuries.

This was really good, but just a bit of tweaking. Keep up the good work.