Vocals are similar to Sadus, check out 'Chemical Exposure' and 'Swallowed In Black'. Still speedy and great, but be prepared for a crappier production.
I'll have to second the Jap. Terror Squad recommendation.
Also, while checking out Razor's "Shotgun Justice" check out Rigor Mortis.
The only Artillery I'm familiar with is their album "Terror Squad", which slays.