Seems like the CRT concept is a more complex one than I had anticipated.

As far as I know an MSMA manufacturer (Yamaha, Honda & Ducati) can purchase an engine from a CRT for 20k Euro's with the gearbox & transmission or for 15k Euro's without gearbox & transmission but not more than 4 times from the same CRT in a single season.

The FIM rules state:

“MSMA manufacturers have the right to purchase the engine of a motorcycle entered by a CRT immediately after a race, for a fixed price of:
“20,000€ (twenty thousands Euros) including gearbox/transmission, or
“15,000€ (fifteen thousands Euros) without gearbox/transmission.

“A maximum of four engine claims can be made against one CRT in any one racing season. An MSMA manufacturer may not claim more than one engine per year from the same CRT (i.e. a different claimant for every claimed engine of the same CRT).”
Other than that I am in the dark. Apart from the fact CRT's will have more engines and more fuel.