VSAN 6.7.0 cache All Flash ratio

I have a small doubt on this.I was reading all the articles(Cormac,yellow bricks and TheBob),however i have small doubt on this.

As per the given articles and cache chart,10% calculation is only for hybrid VSAN not for AF VSAN however it needs to be calculated based on expected/known workloads.

Designing vSAN Disk groups - All Flash Cache Ratio Update - Virtual Blocks

vSAN Caching Requirement

Extending All Flash vSAN Cache Tier Sizing Requirement

Basic questions for vSAN size disk selection

This is for my new setup of AF(5 ESXi hosts with VSAN)

VSAN cache All Flash ratio

Per ESXi host- 2 Disk Groups: Total capacity is 3,840 GB

6 X 480GB for capacity

2x 480 GB  for cache

Doubts:-I dont know the customer workloads yet as this is new setup and we calculated(2* 480 GB cache disk per ESXi host)like this.

Is this cache sizing is ok?

If the customer is actively looking for(100 % write;sequential),then we can choose 2* 600 GB(2 DG,50 K IOPS) ?

Please advise,

Thank you,

Manivel R