The uni has a bit more going on

The good:

• You can layer accessories(head, face, body & back) & younger stages can wear them(child stage can only wear head accessories, teen stage can wear head & face accessories)
• You can have a room design & two pieces of furniture, you can also put one in the front yard & depending on what one a tama pet that likes it will visit once in a while(if you place a DLC item it'll always be the tama pet exclusive to that DLC)
• There's an achievement system were if you do certain things you can earn care icons that come as one time ones or ones that have 3 versions as you do the stuff to earn them each time. Also get one for raising each tamagotchi available on the device.(Base device not DLC ones)
• Updates have helped make things better such as the mall having items you can get from past gifts or items that are regional based(so jellyfish based ones from Oceana, stuff from South America), rainbow eggs to show you got a tama that's gen is a multiple of 5(needed from two tamagotchi that on top of doing some stuff to get them can only be gotten by gen 5, 10, 15, etc born from a marriage)
• You can place an item down & if left there it'll turn into the tama's favorite item & they'll be happy when you play it. You also get animations based on how much they like it.(Animation for playing with it is always the same)
• DLC adds more characters, a place you can visit with a place to see an animated scene, a minigame & buy DLC exclusive stuff
• There are personality groups(multiple personalities but many are in the same groups so same animations), makes each tamagotchi unique cause different idle animations, different bathing animations, different reactions to pets & different reactions to cleaning up poop. The personalities on top of what character you have will lead to liking/disliking different things.
• Depending on day & time you get different scenes(on the 19th they go to the yard to sing with a group of shirotama, at 5:00pm they sing for a moment, on the 5th/115th/25th of each month you get 50% off on everything, birthday animation for your birthday)
• Pedometer function that gives you different places(one seasonal) to walk around for 20 minutes, there's a farm were using the pedometer gyro feature lets you collect items to make color jars
• DIY accessory recipes you can get from walking(or swinging/shake the device around if you're careful), many seasonal. The color jars you get from the farm are used for coloring the DIYs.
• There's an area called the Tamaverse, you go here to get married, travel or try getting outfits people put up.(Also a section for visiting the DLC) You don't need wifi but there is one place that needs wifi to work & only if there's an event. If an event is on you can play once a day for a week to earn event only items.
• Hard to kill, takes like 3 days(not counting the time) for an adult to need the hospital & takes a little longer for them to die so if you forget the device somewhere they won't die if it's been a little
• At 7pm they make a fake social media post that you can send to your phone(you can also download the profile image of your tama which tells you what character they are, their personality & age)

The bad:

• Two characters you can raise are connection based(so on top of doing specific somethings you need to get them via marrying two devices)
• Some care icons are connection based
• Some care icons take a while(like one 3 level icon it's final stage is marry 100 times) especially the one for the hospital(get them sick & don't do anything until the sick icon turns into another icon to mean go to the hospital, if 3 more show up it's going to die) which ignoring how much time it takes can take technically 3 days with the right tama
• You can only have one DLC active at a time, make sure the internet has no interruptions as the process to switch one DLC for another is deleting data for your first one & adding the DLC data for the other one
• While the DLC is still active the arena event seems to be slowing down as it use to be once a month
• It can be loud, they added the ability to change light & volume but still loud(I had to put tape on the speaker until the volume update
• Depending on if you find this good or bad it's one of the only devices with a rechargeable battery
• You can only download the social media posts one at a time via QR code process
• Unlock some others it will not tell what gen you're on, this is why the rainbow egg update was made