You just stepped into a land mine with that comment. So, let’s come back to that later.
Your question contains several points which must be separated so they may be intelligently addressed. You speak of one group of people, “Catholics,” being better than another. Yet, the Bible clearly tells us that it is a sin for us to judge others.
We judge doctrines as true or false, and moral actions as being good or evil based on what God has revealed in Jesus Christ. However, we are also told that to judge others is a sin. You ask me are Catholics holier? It would be a sin for me to even try to answer that.
If all other things being equal would a particular person be holier if he received the Sacraments in the humble devout sincere manner in which they are supposed to be received, than if he did not receive the Sacraments ? Yes, that one person would be holier than that one person would be without the Sacraments. Go to the Sacrament of Confession on a regular basis with sincere repentance and see if you do not grow in the virtue of humility.
“All other things being equal”
Man is bound to obeying God and therefore partaking in the Sacraments. However, God is not bound by them. IF, that is a very big if that we should not presume upon, God wants to give abundant grace outside of the Sacraments, then according to Catholic theology, God is free to do so.
There is a temptation for some I believe to judge others. They see one particular virtue that is important to them or their community and they judge others if they exhibit that one virtue or short list of virtues.
Do I see holiness in the lives of the Saints?
Just read the lives of Saints
Do I see holiness in the lives of the priests and nuns who surrender everything in order to follow Jesus Christ 24/7 ? Yes.
Do I see holiness in those who want to go to Mass and praise God on a daily basis and then go to Adoration at 2 Am just to have the honor of thanking and praising Him ? Yes.
Do I see holiness as a natural outcome of Catholic Teaching rather than Faith Alone, Once Saved Always Saved ? Most definitely.
I am not sure what you meant to imply here.
I don’t want to make your decisions for you, but for those who might be tempted to doubt the efficaciousness of the Sacraments, please consider when the Angel Gabriel came to Zechariah. He was punished for not believing in a promise that sounded too impossible to be true and so good that it would be scary to place one’s hopes in such a seemingly impossible dream that it would come true, Luke 1:20. I suppose there must have been some way for him to know that this was a good angel and not a bad one, but I don’t know how. He was punished for not believing in the angel. Yet, it is clear that there are solid reasons for believing that the promises of Jesus Christ will come true and that He does work through His Vicar. If I doubt the Sacraments should I not expect a more severe punishment ?
Read more about His Promises at