You can tell these two logos come from very different eras. Both of are strong hockey logos but when it comes to the look and use of color, the Thrashers beat out the Flyers in that area despite the blatant use of a hockey stick.
You could say a Thrasher is a Flyer. But the Thrasher sounds much fiercer.
This is where the Thrashers logo gets in trouble for its hockey stick. At the same time, its where I give credit to the Flyers logo for the "P" that does Philly proud. I also like the simplicity in the Flyers logo but the sharp, tapered points in the Thrashers logo work in its favor. Still the Flyers have one of those classic sports logos that will be around forever, I'm sure.