What you mean by customisation? If you talk about watchface, all the same, because they all run the same system, Android Wear.

Then Zenwatch 2, Sony SW 3, or Moto 360 1st gen then.

previous images can't view. here explanation that i found from reddit

It only shows if you have 1 unread message, which has to be the picture. Any more pictures, different chats or following text messages will make the picture disappear, leaving only the message "image". It's not just the background, when you swipe left, instead of getting to the chatlog instantly you will first see a cropped fullscreen version of the pic. swipe left again for the chatlog. The image is only shown if you have "automatic downloading of media" (or what's it called) enabled in whatsapp. It usually also takes a while to be sent to the watch as well.
It's not just whatsapp by the way, as far as I can tell every notification which you could expand on your phone to see the included picture shows up on the watch.

Source

Bro how's the battery like? mine suppose to get by this week

what link?

i got mine from shopee, shipped from china 

took only 10day+ to arrived.

mine easily lasted a day and more with ambient display on at the time and notification 

Notice thy hw watch gt2 just release for pre order. Anyone getting?

Hi, anyone interested to get Samsung GWA 2

Can use 110SAMSUNG promo code to get RM110 discount at Samsung official store ya..

Of course Watch Active is better. In term of brightness, bluetooth connectivity, wifi, battery life, fitness tracking, Active 2 win.
You can refer to below link for comparison. Also, Active 2 has ECG sensor build in. Once the feature in enable in early next year, you are able to use the feature to monitor your ECG reading for potential life threatening AF.
https://youtu.be/pvblFiwnGAU