Well, if it helps, here's what a bloodthirster has that matters. (the ones I tend to play, anyway)
Toughness six, five wounds. Five plus armor (doesn't matter) five plus ward (does matter). Seven Initiative 9, Strength 10, WS 10 attacks that re-roll rolls to hit.
At one time, I had the high elf codex pretty well memorized, and my memory suggests that the star dragon isn't gonna pull that one off, pretty much regardless of what the Lord is armed with, but I'll let you figure it out.
He can also be strength seven with flaming attacks and a 3+ armor save (still re-rolls failed rolls to wound). and a couple of other varieties that I never really use.