The thing I miss most on the BK9 Hammond sim is a good pre-Leslie spring reverb insert, but I’m still struggling even with a long-throw EV-7 expression pedal to shade the line as well as the real thing (we have one at church, so I’m pretty familiar with the foot muscle memory). But all in all, of arranger B3 sims, the BK9 gets as close as any but it’s still a poor second place to the real snarling beast!
Another consideration is the sheer volume of a B3 and a 147..! We tend to play our arrangers at a fairly subdued level, but sit down at the real thing (especially with a real band) and pretty soon (with any luck!) the drummer is complaining he can’t hear himself!!!
There’s a lot to be said for power!
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An arranger is just a tool. What matters is what you build with it..!