It is well known that some amps have perceived volumes quite a bit lower or higher than their rated wattage. For instance, I've heard that many players perceive the Markbass Little Mark II/III to be louder than the Ampeg PF-500 despite the same wattage rating. To those who have experience with both the LM II/III and the Ampeg PF-800, how would you describe the perceived volume between these two amps? Is there much of a practical difference in volume, assuming the same cab? I've also heard it said that the Aguilar TH350 seems to be quite a bit louder than similar 350 watt heads. How much of a difference in volume do you find between the TH350 and the LMII/III? I don't have the ability to compare these amp heads side by side and am trying to get a feel for perceived volume in planning rigs for some future playing situations. Thanks for the help and opinions!