Clearly not everyone has the same level of difficulty in achieving salvation. There are handicaps involved, and some people are born and raised in families with impeccable morals, and are trained at a young age to act holy, while some others, are born in what one might consider immoral environments, and are raised without morals. Others might have unbearable addictions or mental illnesses, like turrets syndrome, that cause them to curse at people or hurt their loved ones.
...So how heavy is the burden..? How hard is the yoke?
"Achieving Salvation"...?
Are you being serious here...?
Anyway, each one will be judged by God only, and God only alone, each one individually according to all the very very many very high number of very many numerous individual factors that need to be factored in, and only all can all be factored in, only by God and God only and alone, for each specific and very unique, and very, very complex, individual life, etc...
Or if you'd like something simpler, then like the Bible says, "each one according to his or her own unique abilities, or inabilities", etc...
Which only God knows fully, etc...
It is not our place to ever judge another personally, etc...
And only ever address the issue of sins with them only if we are not judging them personally, or "very personally" in some cases that I've seen, etc...
If your there to help, then help, but do not condemn, or damn, especially not eternally, etc...
Not our place, etc...
And you just might be bringing a judgement against yourself, etc...
God Bless!