The Japanese Accord comes in 3 base models:
CL-7, CL-8 & CL-9.
The JDM CL-7 is fitted with a K20A3 which is a 2.0 and produces 160hp (European spec produces 155hp). In layman terms, its the one with the single exhaust.
The Euro-R is basically badge engineering for honda's Type-R lineup. The chassis type for this is also the CL-7 but comes with a K20A which is again a 2.0 but comes with a performance tuned head, 6-speed tranny with LSD and a sportier suspension. This is the only CL-7 that comes with twin exhausts. It makes 220hp.
The CL-8 comes with the same specs as the CL-7 with the K20A3 but is a 4-wheel drive vehicle.
The CL-9 is fitted with the K24A2 and is 2.4 and produces 200hp (190hp for the European models and 205hp for the 're-badged' Acura TSX). It comes with twin exhausts. The engine is basically the same as compared to the K24A3 (160hp) that comes in the Asian/American Accord but with a head designed for performace rather than economy as in the case of the latter.
The European Accord also has a 2.2 diesel in their line-up which produces 140hp.
Take it from the person whos owned a CL-9 Type-S since 2005 and did a lot of research before importing it. And if you're looking for more detailed specs on each specific model related to interior, exterior & optional accessories, you can consult the following link:
http://www.japanvehicles.com/newcars/honda/Accord2003/main.htm