I'm assuming that the CBU has the old cluster design (two analog looking gages for speed and rpm). There aren't any real major difference, I personally felt the CBU seats to be slightly softer but that could just be me comparing new and old seats (purely age). Newer CKD models (newer than 2021) have had the auto break disabled and updated maps for Pakistan. I don't think there are any CKD 2021 HS.
It probably can be used on mix but really it should be filled with Hi Octane. If you can't find hi octane the car will not break, so don't worry about being stranded
The DCT transmission will not like it if you inch forward during stop and go traffic or at a traffic light. Let go of the break pedal only when you can depress all of it.
The fabric that protects from sunlight of the panoramic roof is really thin and lets in a lot of heat, consider putting on some kind of UV ray blocking sheet on the glass. Some people complained about the AC performance but really the only problem would be that the AC has to work overtime because of the panoramic sunroof letting in too much heat.
The auto trunk would be a pain and super expensive to fix, make sure it works alright.