DCM vs Polk Audio Center Speaker

So, I have a pair of DCM Timeframe 600s and am currently using a Polkaudio CSi-30 as the center channel. It's a fantastic center channel and I got it because it was as close to the original DCM CX-Center that was made back when I got the Timeframe 600s. However, I have always wanted a matching front channel for my home theater.

Recently, a FleaBay post had a DCM KX-Center (series one) up for grabs for $35.00.  Couldn't pass it up.  So I started comparing specs; probably a dangerous thing to do ;).

So, the specs of the Polkaudio CSi 30 are:

2 - 5.4" drivers
1" tweeter

FREQUENCY RESPONSE:
52Hz-27kHz

SENSITIVITY:
90dB


The specs of the DCM KX-Center:

2 - 6" drivers
3/4" horn loaded tweeter

FREQUENCY RESPONSE:
50Hz to 20kHz

SENSITIVITY:
95dB

I am concerned that the Polkaudio's treble range far exceeds the DCM's. Not that I can hear that high range, it usually indicates that the tweeter is capable of high resolution and detail.   However, looking at it's sensitivity, it needs more power to drive it than the DCM would need. Admittedly, I have had to increase the center volume to get the Polkaudio to balance out between the two DCM Timeframes. Additionally, the horn tweeter in the DCM is not the same type of tweeter that the Timeframes have.

Just want to get some opinions.  Do you think having the DCM center will be better over all with this system than the Polkaudio or did I waste my money/time?