How does a machined razor differ from a cast razor?

Good razors can be made using both techniques. A machined part is generally stronger with tighter tolerances. Machining is a slower and more labor intensive unless a high volume of parts is being produced. It is more expensive. It requires the making of fixtures and jigs and uses more metal (the shavings can be recycled). More complex geometries are possible with casting, but this is unnecessary for a razor. 

Why are your razors so expensive?

They aren't. They are costly to manufacture. They cost more relative to other razors, but you really do get what you pay for. No marketing hype. Just the best razor ever.

Can I get a refund if there is a problem?

The razor is warranted against defects in material or workmanship for life.

Is the lifetime warranty for real?

It sure is. We'll repair or replace your razor at no cost if it should ever prove defective. The only exception is in the case of deliberate misuse. So don't use the handle as a crowbar, and you are covered.