Ahhhhh the Bo105. Loved flying it for the Police in UK in the early 90's. I flew a few of them but as usual I have no idea what the differences were apart from one being a bit longer than the other.
Do remember being on approach to an LZ one night and thought that I was moving the Nitesun in azimuth but had the wrong switch and was actually mismatching the torques giving me symptoms of an engine malfunction.
Exciting times.