You may be better served going to the dealer to get first hand explanation/education about the difference and if this is suitable for your car and, if those are the only required hoses to change if you plan on making the swap.

Alternatively, if my understanding is correct that your car is previously configured with the vent tube hose; how about you cut the new "ventless" one at a similar location as yours, install the 3-way plastic piece with secure clips from your original hose and, connect everything up as you had it originally? And voila! you are once again compliant with original configuration.....

Please keep us posted with your findings.