Before I saw the songs in question, I was sure I would be voting for Avantasia over Queensryche any time of the day.
And yet, Suite Sister Mary - and the whole OM album - is Ryche actually getting it together and creating something spectacular, which they never hinted before or repeated after. On the contrary, Avantasia from the third album onwards is pretty hit or miss (nothing comes even close to The Metal Opera 1 and 2) and the whole Wicked Symphony album might be... the worst of them? Don't know, not sure, haven't even heard Moonflower Society yet, but I'll give it to Ryche here for once.
The first pair is ridiculously easy. Buckethead must be the single most overrated rock musician bar none. I often like his tone and I appreciate his diversity and I admit my dislike is also personal, philosophical and altogether curmudgeonly, but still, Symph X are one of my favourite bands in the whole prog metal subgenre, so although I have my reserves and criticisms (the structure of the track falls under the general "early prog metal epics" ailments, somewhat similar to A Change of Seasons, to be honest), it's still Divine Wings all the way.