Beer is beer, wine is wine, mead is mead. Brewing beer at volume does not equal mead or wine at volume so you need to be clear on your mead making methodology and batch recipe.
As long as your starting brix/gravity is where your recipe puts it, and your mead making technique is solid you won't have problems. You definitely need to be more aware of temperature and aeration/cap management/treatments (if you'r making melomel/cyser/pyment/meth, etc) because of the volume. With larger fermenters temperature management is an issue, the smaller the less of an issue.
I've made batches of wine and mead from 1 gallon to over 150 gallons and haven't had a problem with the same recipe. You need to make sure you have your recipe down, and your aseptic technique in tight. The starting brix, the proper inoculation methodology with the proper amount of yeast rehydrated prior to inoculation, timely aeration/oxigenation, and a well established nutrient addition regimen is common to large and small batches. The techniques are the same, the volumes are different and there are methods to deal with larger volumes. For brewing you have boil off and other issues to deal with, when making mead or wine the starting brix/sg, pH and volume are the key factors.
Consider subscribing to Got Mead? as it enables the site to stay solvent and Vicky and I to keep adding things to benefit the folks who make Got Mead? the great mead site that it is, not to mention addressing issues that are more than just for the 6 gallon a shot home mead maker.
Cheers,
Oskaar