People have GOT to actually play SoEW more before they come to conclusions like this...
[posted stuff]
I'm gonna have to weigh in on this one, just to emphasize how true what Donut has said is. While I haven't done any Lunatic runs (and only 3 or 4 1cc hards), I have 1cc'd Normal and done the Extras on all of 'em including the PC'98 games (haven't had a chance to get UFO yet aside from the demo ;_:) and SoEW is actually pretty easy, especially if you use ReimuC's super strong shot type (ReimuA and ReimuB are quite iffy by comparison IMHO). The game gives you more than enough lives and bombs to do a good run through it, even if the gameplay is less polished than LLS or MS. The bosses' attacks are usually super easy to avoid, with only a few that are really quite bad or nigh impossible to dodge (one of the 4 magic stone's spread attacks I bomb, Marisa's orbs flying out, Mima) Remember that it's the only of the 1p shmups in the series that you need to actively tap the attack button to get the most damage done and if you're not doing that... well, things go very badly.
On the other hand, the extra was by far the hardest/most annoying to do, simply because of how ridiculously difficult the extra boss is (bouncy ball attack is stupidly annoying to dodge, lots of health) and you only get
one life per bomb one bomb per life in the extra mode(!), meaning you can't bombspam it for damage or even to avoid hits (although you do hurt it with bombs unlike most extra bosses).
The UFO demo I played was quite difficult, but I think that's mostly because I paid way too much attention to the UFOs and not the danmaku. Then again, it could require a different playstyle with more planning needed for the UFO drops. I'd say in terms of difficulty for the windows games, it's probably SA for most people in Normal difficulty, especially if you foolishly use one of the many crappy shottypes (compared to ReimuA or much more difficult to learn MarisaB).
Edit: Oops, one life per bomb? Lolz.