Q. Innova crysta, Ertiga & Marazzo. Out of these three which is the best in terms of comfort & performance?

You can't compare them the innova is much more expensive than ertiga or marazzo. It's better to buy the innova because it has more comfort better performance and great value for money

Innova crysta first and second marazzo and last ertiga

If you want all rounder car go for hexa it's less costlier than innova but gives you more value for money.