i talked about it in the review
its a lower gain sound than the EH, sounds far better than the eh imo, bottom end is very well defined, and its not as sparkly as the eh is, which is definatly a plus from me. the valve just has more character and every note rings crystal clear basically the best way i can describe the difference is that the EH just sounds 'cheap' next to the mullard. turning up the gain it goes into a valve distortion quite nicely, thats how im currently using it now, but i dont really need that sound, hence the sale