As far as I can see the only reason to buy the 100 is fort looks and sound.

Some people still prefer the look of a twin, the big single with the cylinder hanging down from the cowl is not as pretty.

And the sound is definitely quieter. The DA-85 is very difficult to make quiet, even with a good canister setup it's marginal on sound.

As far as power and flying I prefer the 85 because of its lighter weight and equal power.

TF