I've got one of my original buckets from 1993 that I still use-I need to rethink that also.
But I'm not really sure what question you're asking. Is it just a general "what do I do now" or do you have a problem that needs fixing?
I agree with the others to practice more on your system as it is-10 batches a year isn't really a lot.
Things to try are different yeasts in each bucket, dry hopping one, not the other, longer primary time, less or no secondary. I've steeped specialty grain on the side to add to one fermenter so I have 2 very different beers from one 1o gallon batch. But really the best thing to do is practice more.