Klaviyo vs Mailchimp

I’ve been experimenting a lot with AMP emails lately (interactive product blocks, in-email forms, etc.) and noticed a big difference between Klaviyo and Mailchimp.

Klaviyo is way more friendly if you’re trying to send AMP the API + custom code blocks make it doable, and the Shopify data sync makes dynamic AMP stuff pretty smooth.

Mailchimp on the other hand… basically strips anything AMP-related and feels pretty outdated if you want interactive emails.

Curious if anyone here has tried both? Did you run into deliverability issues or Gmail validation problems?