I have the Apex WS and my brother the Tanabe G Medallion.
The WS is deep, but quieter than the Tananbe. The Tanabe is DEEP and LOUD, to me it gets annoying when you are on the freeway, punch it or in VTEC. But if you have a kick butt system in your car, you can't hear anything anyways....
I personally like my WS. Getting an intake helps with the low growl sound your looking to get. Don't ask me why, it just does.