Mcintosh MC 252 vs. 402

Does anyone have an opinion on the sonic differences between these two amps, other than 150 watts of additional power? My speakers are Spendor S8es, which I'm currently driving pretty well with 130 watts, so I don't think the difference between 250 and 400 watts will be problematic, so it just comes down to sound. Is the MC 402 just more of a good thing or is there actually some discernable qualitative issue?

Thanks!