I think you can find the answer to question 1 just by looking at the coins then and coins now? It would've been different if it was a hypothetical question, but it's not.
As for 2, it's simply a difference in quality. It's like how Facebook survived and grew to what it is, leaving behind other old social media websites in the past in the dust. A difference in the quality it provided, whether it be in service, product itself or whatever. It's not without reason why a lot of people separate crypto into two, Bitcoin and shitcoins (or 3 if you add those good altcoins)