Simple VS Variable Product

Hi! I sell cellphone cases and I was on a dilemma whether I should categorize them as “simple product” or “variable product” You can view few of my products here: http://www.wordpress.casemestore.com/shop

They are unique products so I initially thought they’re just simple products. I want to have a “other colors available” feature such as this one

Just want to ask if this is possible with this plugin?

Please advise, thank you 🙂

https://ww.wp.xz.cn/plugins/woocommerce-ajax-filters/