Updated my old comment a bit. Apart from the slight XDNA NPU improvement, 7040 and 8040 are the same APU lol. Basically, the lower models, which do not come with the AI engine - the 7440U and 7540U, are strikingly similar to 8440U and 8540U, also without the AI engine.
But these models still haven’t come to India - we’re stuck with the 7020, 7030 and 7035 leftovers. 7040 and 7045 is not available. I was genuinely interested in buying lower-end APUs from AMD from the Zen4 series.