this should be in the "maintenance, sharpening, etc" forum. you should ask a mod nicely to move it for you.
i own both. i highly prefer my sharpmaker. of course i have the congress tool courser stones so i can re-profile with mine without spending a year working on a single knife. if you take the time to understand how the sharpmaker works and adjust to compensate for differing bevels from factory edges put on knives, you will be happy you got it.
sharpening on the corners works fine on re-curve knives.