Heehee... you may want to try samples of each before investing in a 15 or 32 gallon bucket of the stuff. I love the liquid bettercreme that I whip myself but I bought a tub at sam's and I and my family thought it was foul...and it's much harder to add flavorings to the pre-whipped items. Do you have a cake supply in your area? If so call them and ask if they sell the liquid Rich's Bettercreme. Don't assume they don't sell it just because you haven't seen it. My store keeps it in the back in the fridge so you would never know they carried it unless you ask.
Also Smart and Final carries it if you have one of those. Sadly there is no Smart and Final in dallas
so I have to pay more for it at my cake supply.