God's mercy is constant and he has set the same rules for all ~ Jesus spelled out clearly in the Gospels how one can be saved. Therefore, how easy it's done would depend much upon that person's response. Sometimes though, it can turn out that salvation is harder than you think. Take the Protestant who believes that once saved, he is saved forever. Recall that Jesus warned that "not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven" (Matthew 7.21). So we have simplistic thinking here. Now take the Catholic who thinks that he is a pretty decent person and should have no trouble getting into heaven, yet he does not see all his imperfections. This reminds of the Pharisee who thanked God, telling him how good he had been and ended up going home not justified by God (Luke 18). Respond to God's calling and never exalt yourself, then you should do OK.