Since this is brought up, maybe it's also a good idea to make another thread about differences in games that support both regular CD and Super CD (unless it was done already).
A quick list from this
page and
PCECP (the search function is a bit borked ATM):
Macross 2036
Ranma 1/2 Datou, Ganso Musabetsu Kakutou-ryuu!
Space Fantasy Zone (Proto)
Super Schwartzschild
Vanilla Syndrome
Naritore The Sugoroku '92 NARIAGARI TRENDY
Record of Lodoss Wars
Quiz Tono Sama no Yabou
Quiz Caravan Cult Q
I'm quite sure this game belongs here too, but not listed in both sites:
Cosmic Fantasy 3
The following two games are listed as such in PCECP, but I have doubt about it:
Sherlock Holmes Consulting Detective Vol.2:
Has both icons on the box of the western release, but I think it's only regular CD like the 1st game, TTI probably did this to show that this game
worked with both systems, so to promote the sales of the DUO. That Japanese page just outright listed it as SCD.
Syd Mead's Terra Forming:
Only labeled as SCD on the covers of both regions, not sure whether it
plays runs on a regular system.
I think the differences are probably even less noticeable than SCD/ACD games though.