It's all about the execution. If two people have a great idea the winner will be the one who executed better.
i.e. They scaled better, they used appropriate tools, they had a functioning team, they moved first, they listened to customers, they pivoted and stayed agile, they remained focussed on their goal etc. etc.
On the other hand, some products have network effect, which can make them hard to assail once they've got momentum.
Also don't forget the 10x 'rule' - you need to be 10x better than an existing product if you're doing the same as an established product.
As others have mentioned you may also be attacking different market segments e.g. business/consumer, geographical region, age group, etc.
Come to think of it, aren't there one or two books on the subject ;-)
It's all about the execution. If two people have a great idea the winner will be the one who executed better.
i.e. They scaled better, they used appropriate tools, they had a functioning team, they moved first, they listened to customers, they pivoted and stayed agile, they remained focussed on their goal etc. etc.
On the other hand, some products have network effect, which can make them hard to assail once they've got momentum.
Also don't forget the 10x 'rule' - you need to be 10x better than an existing product if you're doing the same as an established product.
As others have mentioned you may also be attacking different market segments e.g. business/consumer, geographical region, age group, etc.
Come to think of it, aren't there one or two books on the subject ;-)