I don't think either is a bad choice, but Aurora has some advantages if you're not a DB expert. Starting with Aurora Serverless:

- Aurora storage scales with your needs, meaning that you don't need to worry about running out of space as your data grows. - Aurora will auto-scale CPU and memory based on the needs of your application, within the bounds you set. It does this without any downtime, or even dropping connections. You don't have to worry about choosing the right CPU and memory up-front, and for most applications you can simply adjust your limits as you go. This is great for applications that are growing over time, or for applications with daily or weekly cycles of usage.

The other Aurora option is Aurora DSQL. The advantages of picking DSQL are:

- A generous free tier to get you going with development. - Scale-to-zero and scale-up, on storage, CPU, and memory. If you aren't sending any traffic to your database it costs you nothing (except storage), and you can scale up to millions of transactions per second with no changes. - No infrastructure to configure or manage, no updates, no thinking about replicas, etc. You don't have to understand CPU or memory ratios, think about software versions, think about primaries and secondaries, or any of that stuff. High availability, scaling of reads and writes, patching, etc is all built-in.

They have a very nice comparison in terms of performance and price https://planetscale.com/benchmarks/aurora

It will be faster and a lot easier to use than Aurora.