mcintosh c2200 vs 2300 - sonic differences


I was wondering if someone with any experience with both can tell me if the C2300 is significantly sonically superior to the C2200. I currently have a BAT VK-31SE pre-amp driving a MC402 power. The BAT is an excellent pre and there is the concern that the above Macs will be a lateral move at best. However, the tubes on the BAT are starting to go again (replaced about one and a half years ago) and I'm growing weary of replacing them at $400 per set.
adamg
The BAT should be superior sounding and the tubes should last for years....are you leaving them on all the time?
How often do you listen? The BAT's tube should last much longer than one
and a half years unless you leave it on 24 hours a day. How do you know it is
about to go?

BTW, VK-31SE sounds closer to a solid state than tube. If you like its sound,
you might be disappointed with the Macs.
1.5 years for 6h30 tubes is on the lower lower lower end of lifetime. Tube preamps need not be powered on 24/7.
Dave