B&C 18NW100 in MTH-46lc

Hi there, This will be my first tim build and I'm looking at a pair of MTH-46lc and am interested in B&C 18NW100 drivers.
www.bcspeakers.com/products/lf-driver/18-0/8/18nw100

I'm leaning towards this build as I like the tapped horn design with the smaller footprint enclosure and I want to step things up a bit from THE BOX SPEAKER 18-500/8-A which I've read mixed things about.

Can anyone please advise me on whether the B&C18NW100 are suitable for the MTH-46lc and how they would respond in terms of low end extension and sensitivity.

Could I expect a noticeable improvement over THE BOX SPEAKER 18-500/8-A
www.thomann.de/gb/the_box_speaker_185008a.htm

Otherwise are there any other higher end drivers that you could recommend for this design. I don't quite have the expertise to run the required modelling and am looking for some guidance around this.

Thanks in advance...