Storming into a mattress store and yelling, "Where's your best memory foam mattress?" might get you a lot of attention, especially if you're waving a big wad of cash. But it's probably not the best way to get an honest memory foam mattress comparison. What you probably will get is a cheap mattress at a price that the salesperson will really like.
A much better way is to do your own tests to determine the best memory foam mattress for you. The whole mattress manufacturing, naming and branding system is set up to create maximum confusion and minimal comparisons between mattress retailers. This simple series of questions will make it easier for you to compare different visco foam mattresses in different stores.
Also remember, there are likely many mattresses that will work for you. Don't worry about perfection. Comfort is a very subjective feeling. It's ok if your impressions begin to blur together after you've tested a half dozen or more mattresses. Just remember to keep some notes and you won't end up with one of their cheap memory foam mattresses.
(Buying from links on this website sometimes adds a bit of cash to my lumpy mattress fund. It doesn't cost you more. And helps me spread sweet dreams everywhere.)
5 Questions You Need to Ask The Salesperson to Find Your Best Memory Foam Mattress
If you're athletic and muscular, with a low body fat index, consider foam at the higher end of the range. Muscle weighs more than fat does. You're more dense than the norm (but you're smart enough to be reading this, eh?) and you'll need a bit more support.
Still like the mattress? Good. Write down what store you're in, the name of the mattress and the price in your notebook. Also write down how thick each memory foam layer is and the total thickness. If the salesperson does not know, ask for the spec sheet.
Now go find two more that you like. Make sure you keep good notes on memory foam density, how many layers and how thick they are, where you found the mattress and the price. These notes will be invaluable if you will be bringing your partner back and when you are negotiating for a good price on your best memory foam mattress.