I think it really depends on where my head's at. If I'm really going through a hard time emotionally, I'll do whatever I can to NOT compare myself to others, because my headspace is kind of negative. But, when I am feeling more confident and I know it's time to improve, then I can open the doors and compare myself to see what I can do to improve and make things that are more appealing and more current with the times.
Plagiarism is a whole deal, and something to try and avoid, but it's harder to plagiarize than you think if you are already starting from an original concept and an idea that is already vibing with you. It's more of a problem when it's like...you're referencing another artist a lot, or referencing photo reference a lot and might be skirting that line. But if you take the time to get more photo reference, or maybe even take your own reference, and if you take the time to refine your work--it will eventually become so different that it shouldn't be a problem.
And honestly, plagiarism is more of a problem with composition than it is for style stealing. Style stealing is like...most people ignore accusations like that because very few artists are really that unique from all the styles that have come before us in time. But composition stealing (like stealing layouts of pages and panels is a problem in the comic industry even for professionals) is more like tracing. There's pretty big differences between a generic style and layout.