1) If you are heavier, you only really have a choice of the R44 for training and hire.....much more per hour.
No have taught 3 people who were over 125kgs in one of my 300C's ( C is a load more powerful than a cbi)
2) Possibly less time to learn on the 300CBi? (any ideas how much less)
When I freelanced at a school that used both 300 was about 10 to 15% quicker
3) Nicer, bigger place to sit in? Could even carry three for self fly hire?
Wouldnt try 3 in a cbi, c no problem
4) Higher Rota inertia, fully articulated head, fuel injected engine...
You have answered your own question
Other good side no 12 year 2200 hour rebuild
On the downside,
1) Bit slower?
300c comfortable at 75 kts will do 85 but you know you are doing it !!!