Both are most likely lithium based greases - can A maybe a lithium complex. Either way, they are nothing 'special'. The grease requirements for your bike or even car are pretty mild compared to the requirements that have to be met in industrial or heavy equipment applications.
i don't like the fact that the grease in can A looks like it is no longer smooth or buttery. Check out the way there are cracks in it. Thats a great indication that the grease was not milled properly. It won't hurt you too bad to use it but it given an opportunity to use a better grease I would opt for a new can.
One why to check if those grease will play well together if mixed - take equal parts of each grease and mix them in a can or paper cup. When you think you have them homogenious stick a screwdriver in the middle of them and see if the grease can keep the screwdriver from falling to the side of the cup. if it falls it means the thickener of the grease has become de-gelled and that the two greases are not compatable. If the screwdrive stays upright than they are mostlikely compatable.
Check out this chart...
