Although GFS might be too far east, I don't know if those western solutions are realistic either. GFS and Euro seem to develop a vort related to convection and the solutions result in the differences we see. GFS has the convection further east. Also, could the Euro guidance be treating this as more warm core, and therefore be more prone to sling west with the environmental flow? Whereas something that is becoming more extratropical may want to move more to the N and NE where the better combo of warm air advection and positive vorticity is maximized. I'm just thinking out loud.