The acceptance of Simplified is varied. Many oppose it to the Traditional language which is a more complex system of characters. The Simplified version is just that, a Simplified version of the complex Traditional language. The Simplified language is often used in mainland China while the Traditional language is still widely used in Taiwan, Hong Kong, etc.
If you only want to target mainland China, I would go for the Simplified banner(s). If you want a broader audience then I would go for the Traditional because those other areas won’t understand the Simplified language. If any of that made sense.
If Ladbrokes offers a way to ID each banner or tracks each banner separately automatically you can always run one for a few days and run the other for a few days and see which performs better.