Just curious, can I use cloud bigtable as a feature store instead of using vertex AI feature store?

[chiayi]

I am trying to migrate my features table stored in bigquery to a feature store with lower latency. I'm choosing whether I should make use of vertex AI feature store or just cloud bigtable.

My features tables are <10MB, and it is used for real time prediction hence a database with low latency is sufficient.

Im just wondering aside from pricing, and ease of exporting data (bigtable requires more steps than vertex ai feature store), what is the difference between the 2 options?

Also, what type of database (eg: bigtable or redis?) is vertex AI feature store behind the scenes, when I am creating the feature store using the web UI?