1.5 brakes

[andylong]

It's much lighter car, it really is that simple. If you're driving a truck you need to plan your braking a week in advance. A Corsa is the other end of the scale.

This might be the case without servo assistance, but the weight of your car just means you need more braking power, whether it be more servo assistance, larger master cylinder, larger caliper pistons, bigger diameter discs.
Heavy cars can stop as quick as a lighter car, it's maths and engineering.
The Corsa might well have more braking power than a Leon for its weight, but it's not anything set in stone.