Which one is better, one 300GB EBS or three 100GB EBS?

When launching a new EC2 instance with EBS (especially the new C4 instance), which one is better? Assuming I need to provision 300 GB total.

1. 
   

   1 single 300 GB EBS storage to get 900 IOPS (General Purpose SSD) or

   
   


2. 
   

   3 EBS storage with 100 GB each and get 300 IOPS (General Purpose SSD) only for each storage?

   
   

Any idea?