Here's a place that has both.
Helicopter Flight Training Packages & Pricing : Eat Sleep Fly ®
So, given that school's pricing,...
For the 200 hours you need to teach in the R22 its $61,000.
With the Cabri you should only need 150 hours to teach (no SFAR 73) so its $58,500.
Not much of a difference for you students I guess,..if you can do it all in just 150 hours, and someone out thre will hire a 150 hour Cabri CFI?
For me though, as just a renter, its $105 more per hour to go joyriding around, so again no thanks!