After using Bendix CT for 4 months, feeling not bad for normal road use. When I drove my fren's Vios, found the OEM brake is a lot better than my Bendix, definitely more than enough for Genting fast driving.
Any recommention for better upgrade without changing brake booster?

What r u driving?
sometimes different car have different feel.
A Neo CPS with its well balanced chassis wont dip its nose easily to maintain weight distribution hence enhancing cornering ability.
Most people judge braking power by this nose-dipping feel.
A car equipped with EBD will feel different too.
U can feel the different when u carry passenger and not carrying passenger.
What u need to look for is the rate of slowing down.
On the OEM Vios's brakes,i doubt its more than enough for Genting fast driving.
"Fast" is subjective to individual meaning.
Bendix CT is for normal use and dont expect much from it.
If u r running on cheap tyre,this will also affect braking as braking is a combination of the brakes and tyre grip.
If u hav good braking power but poor tyre grip,u will loses traction as the tyre cannot cope with the braking power.
Hence the longer braking distance.
For example,my BLM is currently using Yamamoto pads but i am still on stock GY Ducaro.
The braking power is more than grip available right now as my tyre is running out of thread.
If u hav not replaced your brake fluid b4 and its already 40kkmon the odo then i suggest u do so.
Other pads to consider is Bendix Metal King Titanium,RS and Lucas.