Is it necessary to purchase the paid version of the theme that is available for free?

[toxicmix]

Hello valued WM Tool members. I am considering purchasing a Wordpress theme for my Blog soon. I have Boston theme in mind, but I found out that there is also a paid version of this theme called Boston PRO. Is it necessary to buy the paid version instead of the free theme? Does it make a big difference? Unfortunately, not every blog theme looks good on my site since it is based on watches. I found the Boston theme and if you have any Wordpress Blog themes to recommend for this category, I would appreciate it. Thank you in advance Boston: https://www.famethemes.com/themes/boston Boston PRO: https://www.famethemes.com/themes/boston-pro/