There's a slight difference in the taillights - On the Bora they are all red, but the turn signal lights up amber, while on the Golf the turn signal lens is amber.
The Bora would typically be better optioned, also.
If anybody is interested in a complete autodimming mirror/rainsensor or complete MFA steering wheel setup, let me know. I have both that I'd like to sell, complete with everything you need to install them, even pre-made wiring harnesses. If there's any interest, I'll toss them in the trunk.