OK so the 911 is a 1/25 Revell kit the 956 is a 1/24 Tamiya kit
Admittedly my boss wants the 911 as a GTS so the body will need a fair bit of modification (good job as I wouldn't want to butcher the amazing fit of the 956 body.
This is the Revell body
Note the big blob on the front wing and the huge seam lines on the wing, not to mention the flash (and when this was bought that was new tooling)
As a contrast look at the Tamiya body, the fit of the cowl to the front of the body is as near perfect as you could get.
Im not saying that the tamiya one is more accurate than the revell (although I will bet it is) but there is no denying the quality difference.
Look at the tamiya gearbox.
And this thing revell call a 911 engine
I know a lot of the modern Revell, and for that matter Airfix kits could give Tamiya a run for their money but I've got to wonder why we as modellers put up with such poor quality back in the day (I know Revell and Airfix were cheaper back then, but were they so cheap)
Ken's the name modeling's the game.