Is Diva 5.2C an upgrade from Diva C3?

[Greg121986]

I've had my Swan Diva 6.2F speakers for about 10 months and they are broken in pretty well by now. They sound better than they ever have and I am really enjoying them. I have a C3 center channel and Diva 2.1s for rear speakers. I've found that the timbre of my center doesn't seem to match that of my 6.2s, as one might expect. So I have been considering "upgrading" to the 5.2C but I am hesitant. The specs on the C3 seem to be much better than the 5.2C.

The C3 has a lower extension to 55Hz where the 5.2C is 58Hz.
The C3 has a higher sensitivity of 90dB where the 5.2C is only 87dB.
The C3 has a higher power handling of 150W where the 5.2C is only 100W (although, this isn't much of an issue.)

So I have to wonder, would the 5.2C be an "upgade" from the C3? Would the quality of vocal reproduction be better and more clear than the C3? I find the C3 to be pretty good, but I want something that is more crisp and clear. But the specs of the 5.2C make me feel like there would be no benefit to upgrading to the 5.2C. Will there be a major difference?

I am running a B&K Reference 50S2 into an Anthem PVA7 amplifier. I may or may not be going to Emotiva XPA-3 and XPA-1 sometime soon. I'm also considering Rogue M180 monoblocks for the 6.2s, but for now I will be sticking with just the Anthem PVA-7.