We have 4-year-old fraternal twins and the following issue: ever since they were born, one was the "bigger" one, simply put, he's (currently) better at almost everything than his brother (be it reading, writing, sports etc.).
As such I don't think the difference is really an issue, life is long after all; however my concern is that the other one starts having issues with that. He becomes mad every time his brother does something better or beats him at bicycle races or whatever (he wants himself to enter the race but abandons it as soon as he sees his brother being faster). We try to push him or congratulate him, however it's hard not to congratulate his brother as well (Like but I can count to 100...).
It's also sometimes hard to get his attention as he often likes to play "dog" or cat instead of focusing on what you just happen to tell him...
Any idea on how to deal with all that?