Naimuniti 2 and NAP 200

Does anyone have experience upgrading Naimuniti 2 with NAP 200 or 250? Should I expect a noticable difference using that as a bi-amp setup, NAP driving the tweeters and uniti on the LF/Mid? I’ve read some sceptic comments about what such “passive” bi-amping can/can not add.
My speakers are Gradient Revolution Mk IV (passive). The other option could be activating the speakers.

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