I mean other than what you can configure, like RAM and SSD capacity and CPU speed and the fact that the ME294 comes with NVDIA Graphics as well as the Iris is there anything else different? Like motherboard (logic board they call them?) features, or Chipsets on the board?
To put it differently, I usually see similar laptops on Apple online store, with one model starting at lower price and if you choose more RAM/CPU/HDD on the lower end option it looks like you get to the higher end model, both price-wise and spec-wise is there anything else other that what meets the eyes to be considered?
EDIT: So by the looks of it, it is not just a matter of difference in RAM, HDD, CPU speed, that separates the lower end models from higher end models, they are really different things, in some cases it may be just a small difference, but in some it may be significant, I think I got my answer. From the comments. And for the reference the models are like ME293LL and ME294LL