top one is LLC red and is concentrated - you need to add water to it. - its life is at max 4 years.
The bottom one is SLLC and is pink and only sold as premix but has 5-8 year life depending on car.
In either case, you need a full complete flush to make system neat and clean before filling these in. Filling with the red LLC is very easy to get 50% mix. filling with the SLLC on a system that isnt 100% empty means you have to waste some coolant in the end.
I personally would buy the havoline coolant concentrate as its very good stuff and cheap too.