I read a thread somewhere, probably on this board that horizontal center channel speakers had dispersion or other issues that made them less then optimum for any use. If you are interested you might want to do a search.
FWIW, on my own system, I tried a NHT 3 speaker center channel speaker first and found it to be great from a sound perspective. Unfortunately it didn't fit location wise and I had to replace it. I am now using a single NHT Superzero. While I was unable to AB the two, mMy sense was that when I sat closer to the speaker location, the center channel speaker sounded better, whereas the Superzero sounds better if I am sitting further forward. Potentially this may be related to the dispersion issue.
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Living Room 24x18 open 1/2 flight up to a raised dining room/hall 24x12
Outlaw 976 pre-pro running 5.1 system
Outlaw 750 for Artison Masterpiece LCR and 2 NHT SuperZeros rears
Velodyne Servo FX-1200
LG OLED65C8PUA via HDMI2 to/from 976 HDMI ARC
Roku Ultra
Samsung BD-D5500 BluRay
Amazon FireStick 4K to 976 Aux HDMI input for Amazon Music Ultra