"...I plan to make a career change and move into cybersecurity. ... I want to complete security + certification... what exam would you recommend me to take SY0-401 or the new SY0-501"
Here's the short answer: SY0-401.
This blog post explains why.
Information on the CompTIA Security Plus exam. What the test is about, miscellaneous topics, and occassional practice test questions.
"...I plan to make a career change and move into cybersecurity. ... I want to complete security + certification... what exam would you recommend me to take SY0-401 or the new SY0-501"