I have a sky caddie but thinking about switching to a Bushnell, any thoughts?
You're really talking apples to oranges.
The GPS has many features and the distances are usually "good enough". You can also see hazards and get distances to locations that you might not have visibility too.
The laser rangefinder is far simpler (no need to update, wait for it to load, charge a battery, etc) and it'll get you more exact distances than the GPS will. However it can sometimes be tough to lock on to what you might be trying to get a distance to or you might get a distance to something in front / behind your intended target.
Really it comes down to, do you like simpler, or more "techy" the GPS many times will also give you the option to record stats and what not too if you want.
I find that I use a GPS on my phone more often, but now that I have my own rangefinder (vs having to borrow) odds are that i'll use that most often.