Micato vs. Abercrombie&Kent vs. &Beyond vs. Tauck East Africa safari

Looking to book a luxury safari for me, my husband, my mother and a family friend for 2026. Want the most comfortable/luxury experience, especially since my mother is in her 70s and needs luxury lol. Debating between these four companies. I know Micato is generally seen as the best, but are the other 3 significantly different? What’s the real difference between them?

Looking for smaller groups and want to go to Kenya and Tanzania, 10-12 days.

Thank you!