This right here, sure it can be motivating to look at someone behind you and think you're doing well. But it can also make you lazy. It can be depressing to see others way ahead of you. But it can also make you hungry and determined to get there too some day.
Best is to focus on your journey and be better tham you were last year, last month, last week or even yesterday. Your individual progress will always be different from others and also probably never linear. So look at others and more importantly help others! But don't let their progress or lack of it influence your efforts and emotions too much.
One step at a time :-)
It is true, the most important thing is you and your journey. Focus on being a better you everyday, because there will always be someone in front and someone behind but the most important thing is to know you are progressing.