The two systems are remarkably different. Changing between the two isnt impossible, but it’s no easier than switching between the American curriculum and the English one. They're that different.
In Scotland, the age cut off is end of February. So if you’re 4 by the end of February then you start that August. However, if you’re not going to be 5 by the start of the school year then you have the choice of deferring and starting a year later.
So a child who is 5 in September this year can start school this August or next August. Means you essentially get an 18 month age range in classes.
There’s at least a year less compulsory education. Which you may see as a good or bad thing. Subjects start narrowing down younger. Standard assessments are fewer, so the English approach of having targets based on where child was at earlier in their education doesn’t exist. Which may mean bright children aren’t stretched as much.
Uniform is a much, much less big deal. Again, positive or negative depending on your view.
Composite classes are common even in big schools. Staffing seems to be based on total school roll not numbers in each year group. Very small rural schools still very much exist. Within 15 mins drive of reasonable sized towns. So if that’s of interest it’s more readily available.
Catchment areas are almost the only way school admission works. There are maps, you look up the house on a map and it tells you which school the children that live in that house should go to. You can apply for out of zone but it’s unusual. Again, positive or negative depending on your view.
EHCPs dont exist, and there isn’t a Scottish equivalent. Theyre just not a thing.
It all just seems a bit ‘less’. But less state structured education isnt bad in everyone’s eyes.