It's true, Potsy, it doesn't seem much. But, when you get towards the top of any range (cycles, cars, computers, cameras... and that's just a few c's
) you start to spend disproportionately to get the extra.
For instance, £650 will buy you a complete Secteur Sport, with Sora / Tiagra drive, Alex S500 wheels & alloy stays... etc. It'll cost you another £650 on top to get the Comp with 105 kit, Tektro brakes, Mavic rims and carbon / Zertz stays. Does that make the Comp twice the bike? In any measurable terms, probably not. Would I still love to have one? Darned right I would,
if I could afford it.
That's why it is difficult to answer "is the Comp worth £300 more than the Elite". I know that, for my particular set of circumstances, I'd love to be in the position that I could afford it but I can't. If, however, I had no family and was looking for something to complement a couple of carbon bikes, then I could easily justify it.