I can't comment on the BH 92 or that size machine (I have a B2910 with a BL 4690 backhoe), but I can say that with a mini-ex (of comparable size to my backhoe) that it is far, far faster .... and I can do certain things - like crossing an open trench and then pivoting to straddle it .... or straddling an open trench and then pivoting to leave it - that I would never consider doing with my B2910 and it's hoe.
Day before yesterday I was straddling an open trench with a Kubota U17 (7 1/2' mini-ex), working backwards, cleaning up the bottom and the spoil that had fallen in .... and I got a little sloppy backing up and got the right track a little too close to the edge .... and down it started to go ....
I was able to use the machine to pick itself up and pull the track out of the trench, and re-center and continue on ....
Definitely a little bit of a "pucker" moment ....