Storage cost is much higher. Express One Zone is $0.16 per GB while standard S3 is $0.023 per GB ( https://aws.amazon.com/s3/pricing/?nc=sn&loc=4 )

> Compared to S3 Standard, even though the new class offers 50% cheaper request pricing—storage is almost seven times more expensive.

The house always wins https://www.vantage.sh/blog/amazon-s3-express-one-zone

Ingress pricing is indeed cheaper. POST is $0.005 per thousand requests on standard and $0.0025 on express one.

Egress and storage however are more expensive on express one than any other tier. For comparison, glacier (instant), standard and express are $0.004, $0.023 and $0.16 per GB. Although slight, standard tier also receives additional discounts above 50 TB.