Kevin - Suggest you to raise SR. Also, what is the number of rows*columns between the two? 

So Oracle mentioned feature is not available currently but they have logged an ER - 16311006 .

Thanks Sri. I did raise an SR. The option that Gail mentioned is technical and requires editing application system file.Do you know how to hide 'Excel 2007+' option under Export for SaaS customers?

Thanks Gail. It lists the steps which requires technical expertise and now sure if SaAS customers can do that. I will raise an SR and see if we can achieve by other means for SaaS customers.