Upon reviewing my notes I noticed I indeed did forget something.
Along the Kokiri / Garuda run a distress beacon was picked up off of a ransacked Garudan Freighter. You also picked up some lifeboats from that freighter and the rescued crew tell you that they were set upon by a Taul Detral destroyer. They abandoned ship flying off in their lifeboats escaping capture. Their cargo was mechanical parts and supplies bound for Kokiri. Their ship was hit a few days ago. (From point of pick up.)
To answer the logical question. No, the Taul you just shot up does not match the description of the one that attacked the Garudan freighter.
The Garudan crew, as well as the intell you have from Kokiri and other sources tell you that Taul Detrel and Tou Redir (Zent picket ships) are common pirate ships due to their mass production numbers. Consider them the AK-47s of the shipping world, cheap, effective, everywhere.