senko no ronde despite appearances isnt really a shooter. i have played quite a bit of the nesica x live version of duo and think of it more as a top down version of virtual-on with a more prominet lock-on than anything else.
never played the touhou ps4 version / clone as i didnt hear much positive about it from reviews and community, although mainstream site always give luke warm opinions on this stuff at best.
Understood...most likely why I have never really played mine. But I lump them in because of the G.rev link. And enjoy collecting them all for some eventual play.