Pierre, Gary's BMW 3,0 CSL (Tokyo Maruii) looks great, but the 3,5 CSL from ARII/Micro Ace only looks good on the box lid, but is really awful - body distorted (grill and headlights too small, front spoiler huge!, wheels too tiny, tires too fat ==> it looked like the box of the US Airfix version in your post(could have been the same kit), the decals are junk, the whole kit is a mess - so I sold it a few years ago.
The Gunze 365 GTB however, is a toy and not a model kit in my eyes with a very shallow stock ( !) interior and a sheet with racing decals - the body shows similarities with the real car, the rest is totally useless (eventually for slot racing). I wanted to take some pics, but could not find it anywhere.