^^^This is actually not totally correct.
The treadwear rating on a tyre doesnt indicate how hard or soft the compound is or how much grip the tyre can provide. The only way to judge how well a tyre grips is to use it and judge for yourself.
There are many different factors that determine a tyre's outright grip, like: tread design, tread depth, casing construction, silica or non silica. The tread compound isn't the only thing that gives a tyre it's grip.
Treadwear ratings are also highly affected by the depth of tread on the tyre... For example if a manufacturer made 2 tyres with exactly the same tread compound, design and casing but one had 5mm of tread and the other had 7mm of tread you would have almost the same performance from both tyres but completely different treadwear ratings.
To answer the original question about Hero tyres - they are manufactured by Federal as their tier 2 tyre, they share a lot of similarities in design and construction with Federal tyres and are comparable quality.
I have personally driven an R32 GTST Skyline on Hero Milanza HZ1's and found them to be very good tyres for their price.
The moral of the story? - Don't judge a book by it's cover.