Let's start with KAMIKAZE / DJ NRG :

On Super Eurobeat Vol.34, the length is 5:45
Now take a look at the vinyl :

It's 7:00...
Hopefully, this song was released in real extended on パラパラオールスターズ Pres. Super Eurobeat~隠れ名曲!~ with a length of 6:49
Another exemple with T N T / Derreck Simons :

On Super Eurobeat Vol.45, the length is 5:53 while on the iTunes album SUPER EUROBEAT presents DERRECK SIMONS Special COLLECTION, it's 6:46
Another exemple with Super Eurobeat Vol.34 :

STRONG BEAT / MEGA NRG MAN is 5:53 while on his iTunes album SUPER EUROBEAT presents MEGA NRG MAN Special COLLECTION Vol.1 it's 7:08 both are Strong Dance Mix
Now the inverted, and still with Mega NRG Man.
On Super Eurobeat Vol.48, TRANSMISSION / MEGA NRG MAN is 5:54 while the same on his iTunes album SUPER EUROBEAT presents MEGA NRG MAN Special COLLECTION Vol.1 is 4:49 and of course, both are Extended Mix