When I saw Dr Z's BN MT in the "ST400" thread I couldn't resist. As indicated its the edge access which is particularly improved.
Found it quite easy to close up without plier rest contact and just normal process with cable-ties fitted. Now I have extended one plier rest with a Wingman scissors spring arm. Not yet got something suitable for the other side. A drill maybe
Orginally I bought an MP600 for BN capability. Was OK, left the pliers deployed on my bench, but never liked the half-open access to the individual tools. Had never totally taken the Spirit, it would never have displaced Rebar for EDC, partly because I can chose how easy to make tool deployment but in BN form the Spirit easily relegates the MP600. Basically I wasted my money on the MP600.
An unexpected benefit, because the Spirit plier jaw faces weren't parallel, the cutter now closes further and the soft wire notch is greatly improved.
I can see the Spirit growing on me if I can solve the nail breaking difficulty of deploying the Phillips driver.
One other thing, I now have a proper lanyard ring and I made the Spirit knifeless for UK legal carry. Work it out, I am not going to spell out how.