The deep creep and the motor treatment are the same product, just deep creep is in an aerosol can.
I get the deep creep and spray it in the carb when she's idling, till she stalls. Let it sit in there for a while then fire it up, smoke everywhere as the carbon burns off. This is called decarboning your combustion chambers and should be done regularly (especially if you troll with a 2 stroke)
You can also decarbon as others mentioned by dumping the seafoam into your gas, this would possibly be an easy way to clean out your carb jets as well (but not as good as a carb rebuild) Some run a strong concentration in a small gas tank for extra cleaning (may smoke)
For ethanol, the best is to buy shell V power only and never have to worry. Doesn't attract water and has twice the storage life. Another benifit is it has more detergents and will keep your motor clean. If you are burning the gas up quick yes you can get away with regular but don't have it in that tank for multiple trips or long periods of time.
I like using synthetic oil too, it will protect you in an overheat condition. I actually overheated a motor once to the point of warping the head, and since I was running amsoil she survived (except the head) Compression test revealed the compression of a brand new motor. (after fixing head)
If you start with a properly tuned motor and are religious with the fuel diet of your motor it makes all the difference in the world. These things are the difference between being stranded, having constant aggravation, and having a reliable motor that lasts 20 or 30 years.
I can't believe it when I see people cheap out on gas and maintenance.