I didn't realise that the base was a chop either and I know you've not tried to cheat, so all I will say is make sure you double check your bases before using them - use google's drag and drop image search feature to search for identical images, but I doubt that would have helped much in this case

Onto the chop:
The update is definitely the best of the two And actually has some pretty cool mods - I love the removal of the rear lights on the boot
The plate is really cool too - but it's being lit up by the headlight bits, but the lights aren't turned on

There are only a couple of mistakes actually:

• The wheels seem a little bit small, compare them to the base and you'll see that they're not as big
• The car shadow needs some work - yours is big, black and blurry. Again compare this to the base and other pictures - car shadows just take practice. I think there is a tutorial somewhere in the tutorial section
• The tyres are too thin in places - look at where the front wheel touches the ground There's barely any tyre at all

Everything else looks pretty good though - nice work

Well, here's some: I don't think any of the modifications you made improves the base image.