Since my last ecommerce cart leave me hanging, I recently migrated my ecommerce website to solecart and based on my personal experienced the site switching is quick, easy and I didn't loose any important data. Solecart team guided me all the way. The support is great and I don't have to pay extra and monthly fees. I go for solecart. Try solecart too...
I'm not familiar with SoleCart so I cannot compare Prestashop to SoleCart; seeing as SoleCart is a new open-source ecommerce application to scene. Prestashop does have a intuitive back office and front office imho and a great community support and diversity of modules to expand their shopping cart. I suggest your compare SoleCart demo to the Prestashop demo and decide which shopping cart is best for your situation depending on what type of ecommerce site or services you're going to offer to your site's users. Also bear in mind the third-party partner extensions you'll want to integrate into your online store to ease user's shopping experience.