Hmm...since you've not specified which Bezza model/trim which you're comparing against the 2013 Forte, let's take the premium range which is the BEZZA 1.3 Premium X - Auto.

On the spec sheet, it appears that both vehicles are quite comparable. Bezza with a lighter kerb weight vs Forte which is heavier but with a higher capacity engine. Nonetheless, perhaps we can all say that the Bezza edges the Forte just a notch in terms of Power to Weight ratio (although the Forte could very well manage the Genting hill climb if the Driver knows how to manage the manual shiftronic mode).

Safety wise, I'll have to say that the Forte comes out on top with ABS + VSC equipped whereas the Bezza only has ABS + EBD.

I have not driven a Bezza up Genting, so I wouldn't know for sure which vehicle would be best suited for such purpose.
Nonetheless, my vote might probably go to the Forte for a roomier interior + slight edge on the safety feature (especially useful on winding roads.

Only thing with the Forte (or for any other vehicles for that matter) is that one should always be mindful of the braking system, especially going downhill from Genting.

Hope this helps and good luck!

-Edited for spelling correction.-