There are no variants in Ciaz unless you count transmission as variant difference.
If that is the case then it is totally dependent on you
Its a personal choice auto or manual.
Suzuki ad on packages are shit so go for aftermarket ones.
Yes steering wheel controls can be installed but finding the steering control buttons and its casing will be near impossible over here. They are not even available on AliExpress. All cars with this shape of steering wheel have both cruise and multimedia button except Uk model celerio.
So you have two options search places like Bilal jung, sultan ka khoo and try to find celerio or get the whole steering wheel of Vitara or just the buttons of Vitara from the above mentioned places or AliExpress. Cost from aliexpress would be around 15k just for the buttons.
Its readily available
No own or premium but withholding tax you will have to pay
Cost of accessories
Alloy wheels : 20k (chinese) to 150K (branded quality stuff)
Steering controls: 10-25K
Android Tablet: 30K
Seat Covers: 4-20K (deeding on quality)
Chrome package : no idea
Fog Lamps: 3K-8K
Door visors: 2-4K