Actually, seeing the difference between our two is instructive, I think. We were, indeed, almost the same. But knowing that you can either set the <option> to selected or set the selectedIndex to match the desired <option> is good to have in your coding arsenal. (And knowing that you must use selected if you want to set multiple <option>s in a <select multiple> is also good to know. And and and.. The more you know, the better.)
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.