Japanese models had a different front panel and bonnet with a lowered central section. I also think this car's black detailing may not have been original.

Mazda 626 2 door coupe profile
Although less visible than it could be due to the large plastic louver fitted on this car the coupe had a more wrapped rear screen and the C pillars were more forward slanted; howevr the basic body design is unchanged from then sedans.

Mazda 626 2 door coupe rear quarter
Still known as Capella in Japan I believe, the 626 name was used from this model onwards on other markets (I believe the previous model was codenamed 616?). Mazda moved to numeric names thereby emphasising the marque name over models; since the early '90s this policy has been slowly reversed (Datsun had done this too in the 70's and 80's).

Mazda 626 2 door coupe rear
Not much variation visible from this view between the sedan and coupe; interestingly the rare 1st generation RX7 convertibles reputedly used the boot lid of these cars!

Mazda 626 facelifted 2 door coupe front quarter
Confined only to revisions to the bumper and the stationary panel forward of the bonnet this was a fairly minor update to bring it inline with the Familia/323/GLC models. The grille now stretches unbroken between the headlights and though not so visible here vertical bars are more pronounced than before.

Mazda 626 facelifted 2 door coupe rear quarter
Similarly the bootlid edge now runs straight across and the bumper is different. Tailights are much bigger (deeper and wrap into the number plate cove) than the previous model, though whether the underlying metal changed I don't know.
Side protection strip is also deeper.