Phone Calls vs Form Leads – What Actually Converts Better for Agencies?

I’ve been testing both for different client campaigns and honestly, I see mixed results.

In some niches (like home services, legal, insurance), phone calls convert way faster. People who call are usually serious and ready to book or buy.

But in other cases, form leads are cheaper and easier to manage, especially for B2B or when the sales cycle is longer.

For marketing agencies here:

• Are phone calls converting better for you?
• Do you see higher close rates from call leads?
• Or do form leads give you better ROI overall?
• How do you track which one actually brings revenue?

Would love to hear real experiences, not theory. What’s working for you right now?