Kanger Aero or Aspire Nautilus?

Ok, Im lookin for a new tank. Cant decide on the Aerotank or Nautilus. Im using the MVP2. I like then both.
The Nautilus airflow valve locks where the Aero doesnt. The Nautilus has 3 airflow positions where the Aero has (from my understanding) more airflow settings.

Also, Why are people “drilling” out the air holes on the Aero?

Just would like some input as to people’s preference. The Nautilus is like $10 more than the Aero at my local B&M.. Thanks.

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