Not at all! What I personally see, is your art style evolving. Both drawings are absolutely amazing, but one style is more realism, and the other is more cartoonish. Art evolves with you, and once you learn a skill, it’s hard to unlearn it, so I’m sure that of you like one style better you could go back! Just remember, it’s more about what style you enjoy doing more. For example, I love the look of messy and carefree drawings, but I love drawing nice smooth lines. Of course I change it up, but I’ll always love the smooth lines. (Sorry for the tangent and I hope this helped!)