Since pwars are gone, I was wondering if building a level 1 t4 would be better than level 3 t3 for EBs and real wars. And how will it affect the plunder?
No it wouldnt be better. Less troops, less stats an less plunder. It isnt really an upgrade unless you can upgrade quickly to level 2
Difference between Sub lvl 3 and CF lvl 1 is ~4,600 attack difference. It's a bit higher, but not much. Invest.
If you're converting from t3 to t4 I always preferred waiting until I had enough to build a level 2, but if it's on a new land just go straight for level 1.
There's no real reason to wait though, since the plunder of a T4 Lvl1 is higher anyway. It's just a personal preference if you want to save up for Lvl2 or Lvl3 straight up, I guess. I personally wait until I have enough straight to Level3. Because I enjoy seeing the leap in my stats
A l1t4 gives better stats and more plunder than a l3t3. It's only a slight increase in both but it is better