He shouldn't be sore after shoeing, if he were then you'd want to be talking to your farrier!
The only fundamentally different things are umm:
- you need to be pretty good at picking his feet out every day as shoed feet are more likely to trap stones which can cause bruising or more.
- he will cause more damage when he kicks and this is particularly relevant if he is kept in a herd situation
- you will be poorer and will probably be spending far more money on his shoes than your own
- if you go on rough terrain or gravel roads, with shoes on he will be more comfortable and less likely to try to take you to the soft grass edges
- if you ride on icy surfaces in the winter a shoed horse will slip more and you will need to be aware of this.
I had fully shod horses in the UK, and my two are supposed to be shoeless now. Riley had to have front shoes on this summer because of a hoof problem, but will be going naked again in November I think. Either way has slight advantages, and both can work.
I hope it goes well, and that your farrier does a good job. Oh, and that he looks super smart with his nice new shoes.