Of course the execution matters, so, you know, let's jump down that rabbit hole.
x R' U R' D2 R U' R' D2 R2 has two D2 moves. How do you execute them? Ring-middle, middle-ring, pinky-ring, ring-pinky? Four choices each for the two D2 moves, although practically speaking you'd probably use the same execution for both D2s, so let's just call this 4 possibilities. What about the U' move? Can be done with left index (more common) or right index (less common). So, 8 possibilities now.
All of these also apply to the l' U R' alg, so now we have 16 possibilities. All of which are
essentially the same.
Actually you should also double this because there's the question of whether you do an x' rotation at the end versus just keeping the last layer on B, so that's 32 possibilities, already exceeding the maximum poll size.
You can ask the same questions for all of the other algs too. Like, take the wide T perm. How do you do the first U move? Could be right index, could be left index. What about the last F' move? Could be right thumb, could be left index, could even be something else. Again: it's all essentially the same.
If you're conducting a
plurality-style poll, it only makes sense to coalesce extremely similar algs. (Even in an
approval voting system (like what SCDB has), which theoretically doesn't suffer from the same problem, I'm still not going to bother to vote for every single variant of the same alg either, because that's way too much effort.)