Find 5 people, that are potential customers, to review your copy. Tell them you are going to send them two pitches and that they should tell you:

1. Which one they liked better.
2. What, specifically, they liked about it.
3. What they took away from the pitch.
4. What could be improved.

Congratulations... you've conducted your first A/B test on your landing page without even touching the design. You've focussed on the copy and that's the most important part.