I did not write that HAPP is better:P
this question is stupid because standard for shmups does not exist on jap, euro and USA - never.
in japan shmups programmer does not decide about joystick. it is only firms connections.
in 90' SEGA, SNK, Capcom, Namco have deal with seimitsu and get flagship model Seimitsu
Taito now use only sanwa, and now SNK and Capcom use cab Taito and get Sanwa. they want or they do not want - still get flagship model Sanwa witch Vewlix cab you get JLF on SF4 and Raiden4.