Dextrose (corn sugar) makes for smaller, more effervescent bubbles. Sucrose (Table Sugar) carbonates just fine and I use it, but if the bottle isn't done carbonating and cleaning up can make the beer taste real green. I noticed this a couple times and now always leave my beer in the bottles for 3-4 weeks. The first time I used corn sugar it wasn't properly carbed at 2 weeks but didn't taste as green.
Short and sweet: If your patient it doesn't make a difference except the size of the bubbles. Just remember Dextrose uses a different amount than sucrose. Use a priming calc like found on northernbrewer.com to find out how much to use, don't use the Mr. Beer directions, I ended up way over-carbed using those. for a normal Mr. Beer batch you should be using 1/4c or less depending on fermenting temps.
Short and sweet: If your patient it doesn't make a difference except the size of the bubbles. Just remember Dextrose uses a different amount than sucrose. Use a priming calc like found on northernbrewer.com to find out how much to use, don't use the Mr. Beer directions, I ended up way over-carbed using those. for a normal Mr. Beer batch you should be using 1/4c or less depending on fermenting temps.