Most builders should be able to supply you with a standard build specification for their construction items so you can see if their build specs are what you want.
This is the hardest part of it all though trying to compare builders and pricing and what you can't see. It takes the longest time.
In wa it's a little easier (perhaps) as there is quite a bit of commonality with base level specifications but there is an infinite amount of things which you can specify and not specify.
I found it easiest to get the specs from all the builders then the quotes for any upgrades I wanted. I had to see about 5-10 builders to bring it down to 3 then go a bit further along the process and then pick the final.
Some days the less you know/think the better it is
I don't want to choose between metal or wood roof trusses I just need to know that it's suitable for my roofing and meets HIA standards.
After that its choosing the level of construction and specification which is right for the area you are building in. Lower socioeconomic or higher?