the layout is different

The sprites themselves only use 3 bit planes, so they can only use a palette of 8 colors, even in EGA mode. Not sure if this was to save space, or to provide better color mapping for CGA mode.

@Dolphman Umm... Kind of but it is far more complex than that. US Gold got an exclusive contract with Capcom due to Elite's success with Commando and Ghosts 'n Goblins however that would have only covered the home computer ports outside of Japan and the US (hence why this port exists). They paid £2 million to port 10 games (from Side Arms to Strider), then got a different contract/s (for Final Fight, Dynasty Wars, UN Squadron, Mercs and Mega Twins/Chiki Chiki Boys with the latter seemed like an expiring contract due to the cancelled ports) and think that they got a separate license for Street Fighter II. I don't know whether Gun.Smoke was part of the 10 game deal since it was just a dolled up version of the Spanish Desperado game.

Capcom weren't really bother too much unlike Sega, Taito and Namco who were more willing to port stuff. They only started doing ports themselves to the Sharp X68000 when the CPS1 came about and why we got almost perfect ports of Final Fight, Strider, Ghouls 'n Ghosts. Most of the time it was either licensed to other companies like Sega and Hudson/NEC (Strider, Forgotten Worlds, Ghouls 'n Ghosts) or sub-contracted to the likes of Micronics for the NES until Capcom themselves took over. Arguably most console and home computer hardware in Japan at the time just wasn't able to do a port of Street Fighter 1, the Mega Drive could but Sega didn't want to or wasn't offered. The PC Engine was very lucky because it was more powerful than the NES and ended up getting ports of 1941 (via the SuperGrafx), 1943 Kai and F1 Dream too. Capcom also wanted to do more original games, noticed when they stopped using Micronics, the ports more or less took a back seat until the CPS came around. After all Capcom were closer to Nintendo regarding consoles until the PS1/Saturn, also reflected in terms of the popularity of the NES in the Japan/US at the time.

Oh and why Street Fighter got changed to Fighting Street on the TurboGrafx-CD was nothing to do with US Gold but a copyright issue. Hiromasa Iwasaki (who worked for Alfa System) mentioned this but can't remember why. This could be why Capcom hesitated regarding Street Fighter 1 and why it was forgotten until years later. Apparently Yoshiko Okamoto thought it was Namco who got the copyright but Iwasaki put it down to faulty memory. (Sorry it is a bit of a rush, the latter was breaking news).

@Yawackhary Was US Gold the sole reason why we never saw proper ports of Street Fighter 1? (That would explain why nobody heard of it until way later after SF2)

GOOD

Looks like the US Commodore 64 version in terms of sprites but this has more color and uses a higher resolution. Actually they look fairly good for a 1980s DOS game.

Don't know how it plays like but probably one of the better ports (outside of the PC Engine Fighting Street that's still the best before the likes of emulation) just on the grounds that it wasn't done by Tiertex.