How Is Marketo Different from an Email Service Provider (ESP)

How is Marketo different from an email service provider (ESP) ?

A) Marketo can dedupe data and nurture leads; an ESP can host landing pages and provide email open rates.
B) Marketo can score and nurture leads; an ESP can send multi-step campaigns and track open and click rates.
C) Marketo can measure the impact of marketing initiatives on revenue; an ESP can track open and click rates.
D) Marketo has the ability to send personalized emails and monitor website actions; an ESP can send email blasts and score leads.