They all sound like pretty much the same things, except for different ones to drop.
For the summons, perhaps one being a sentry, having absolute control of about a screens worth of where it is, dealing with things far better with the things there then its counterpart, even with multiple - Up to a certain point in that multiple regard, obviously - While its counterpart has far more area to roam, easier to use.
For the ranged items, one being a gun while the other a bow. Changes being something like "this one fires a lot of powerful shots, hard to control except against big mobs, like bosses, or up close, and relatively slow. So a shotgun, perhaps in bow form or in gun form", and something like "fires lots of attacks fast, rather controlled, if far away from enemies deals way more then equivalent, but if close up the shotgun type thing absolutely destroys it in DPS." Something of that sort.
The yoyos need to be more varied then that. Not saying they shouldn't not have that, just saying they should have more then that. What to have? No idea.
You're also missing out on magic, throwing, and perhaps armor.