OP, don't underestimate the impact of the weather and shorter summers. This can massively affect quality of life and health.
As for unis, they would have to do a 4 year-degree rather than a three. This is because you can go to uni is Scotland with Highers only, so the first year is like a foundation year.
Also, be aware that not all schools will offer a full range of Advanced Highers (similar to A-levels - an A at AH is the same UCAS points as the A* at A-level). It depends on the cohort and how many tend you do AH, as many students just go to university with Highers only because they can, and don't apply outside Scotland.
Having said this, some really like the more 'exploratory' first year as you can try a broader range of subjects in a less pressured way. On the other hand, in 4 years at an English uni, you could have earned a Masters on top. Or perhaps had a placement / study year overseas, as opposed to 4 years in one place.
Edinburgh uni has a very good reputation. As does ST A's (although it a quite small and remote town and not everyone would want that for 4 years).
Have a look at the Higher Ed threads - success rates for Scottish students into Oxbridge are the lowest in the U.K. It's unclear why this is - but possibly because a lower proportion do AH than the equivalent who do A-levels? One poster this year was arguing that her son did poorly in the MAT (maths test) for Oxford because some of the topics had not been covered at the time of the test.