Actually I am not familiar with the plan each of these companies offer. I have used them all to host various sites over the years (including gambling related) and was generally happy with their prices and services. I omitted several I have used and was NOT happy with reliability or support.
I recommend you choose the one that provides a package that best suits your needs and budget.
PS: While I dont know the specifics of the multi hosted plan you described I would personally opt for individual hosting.