Black +Decker 20V vs 40V MAX -Cordless Trimmers, Which one should I buy? ACTUAL TRIM Comparison

Using these two Lithium charged inexpensive trimmers side by side on various lawn & gardening trim situations,
amzn.to/3oP8KP1 10" MAX
amzn.to/45PCkEz 13" MAX
amzn.to/3qoPrfY 12" MAX