I have just taken pictures and sampled both bases (cold) . The Restaurant is lighter in colour, stronger in aroma but pretty similar in consistency. The flavours are not too dis-similar , but there is definately a flavour missing. I seem to be getting a cinnnamon/star anise hit in the aroma and slightly in the flavour. Homemade base smells stronger in certain aspects, maybe more oniony or tomatoey , hard too tell.
The wife has just come into the kitchen as I am reheating restaurant base , so I got her to smell then taste the base, she said that there is definately stringy vegetables in there from the texture, and from the taste and smell she said parsnip, maybe swede or turnip, but it has a parsnipy aroma. She said it is definately a vegetable difference between the 2 bases!