In a few shorts words. yes and no.

The preamp section in the dedicated preamp is supposed to be better than the one in the integrated, although i dont think it would be as much better to justify the price tag. If you want an improvement my advice would be to build the foreplay tubed preamp or something similar to match with the power amp section of the 372. This is what i have done with my 370 and im very pleased with the results.

Haoleb's Audio/DIY Website