They are both amazing shotguns, its really just preference.
As for defense loads, I stick to the classics: 00 buck, with slugs on a shell caddy "just in case".
For practice, if you are just trying to develop muscle memory and work drills, IMHO, its acceptable to practice with trap/skeet loads that are cheap. You can use those to work drills to build good habits, then switch to something like real buckshot for accuracy and general shooting practice.
If money isn't a factor, drill with what you intend to use for defense all the time, but I can't afford that, so I generally drill 80-90% with cheap target loads and then do a handful of drills with the real thing to make sure my accuracy is not slipping.