Presales or Consulting

I have been working as a consultant in a small consulting company in Hong Kong, which focuses in different enterprise solutions, like CRM, BI and SRM.

Now that, I have an opportunity to work as a pre-sale consultant in a start-up in Hong Kong by a US leading vendor company.

I wonder what is the right path for me? To stay in my current position, continue to learn different enterprise solutions? Or to take the challenge to work in a demanding pre-sales position?