B2B Cold Email - Outlook ESP

Anyone cracked the outlook esp for cold outbound.

With my lists and email content being the same, this is the following results that I am getting consistently;
Outlook to Outlook (mediocre results)
Google to Outlook (okay - average)
Google to Google (excellent).

I am struggling to crack outlook esps, I barely even get OOO replies either.

Outlook is shit. There's not much to do because they don't provide tools like Google Postmaster Tools where you can analyze why your emails are landing in inbox / spam, being marked as spam, etc.

Microsoft's SNDS is only useful when you have a dedicated sender IP. Google Postmaster works when you only have domain and shared sending IP