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.