I owned two amps in Classe's old CA-N01 series, the 101 and then the 301. They were apparently (according to rumor and hearsay on the internet) based on the same circuit topology, and differed primarily in power ratings -- 100 W/ch (8 Ohms) for the 101, 300 W/ch for the 301. The 101, at 1/3 the cost of the 301, sounded much faster, balanced, immediate than the 301. The 301 could produce astounding bass, but was for the most part sluggish and boring. I agree with reviews of the 301 on AudioReview.com that suggest the 301 is "polite" and "laid-back".
Classe presented the layout of the two amps in their web-avaialble product manuals for 101 and 301. The larger amp has 5 output devices per channel. I've read that having a relatively large number of devices, in which the output is delivered by multiple components, can be the cause of a sluggish, somewhat incoherent sound. Just a thought.
My BAT VK-200, which has only two amplification stages (though I don't know how many output devices) to produce its 100 W/ch, sounds marvelous -- clean, quick, clear. And my old Forte 4A at 50 W/ch was one of the best amps I've ever owned.