a lot of unrelated stuff in your post. there is no need for zram or swap (regarding the first posts its swap and not compressed ram, but i do not know myself what it is) if you get an extra 1GB of ram. 1 GB of ram is ALWAYS better than zram or swap. zram is a nice option when you cannot extend the memory for various reasons and swap may be used for heigh memory use cases when you have some not too slow alternate memory. n9 internal memory is still damn slow for swapping (if it is indeed a swap faile on disk at all).
but actually there seems to be no good reason to not add an extra GB as we can see the nexus 6 has it, the nexus 9 ha definetly room for it (it is not like pc dram module) and it is damn cheap also.
secondly, i'm not talking about multitasking when i pointed out 64bit, so why the hell are you bringing this in? beside of that on a tablet multitasking it meanwhile not so uncommen. the point is that a 64 bit os has a MUCH larger memory footprint. also such high screen resolutions add a decent amount of memory either. and finally, your argument about benchmarks proving anything related to my comment is unrelated at best. it doesn't prove anything related to my statement.
there is aboluelty no reason to prefere zram or swap over an extra GB of ram, and it seems that there is nothing that would made it difficult for htc to add it. i can only assume that they added this just collect some experience on it and nothing more.
i really don't get it. what's the purpose of your statement? showing of your lack of knowledge or celebrating fanboyship "oh cool, they skipped a 5$ GB ram but gave us zram hurayyyyy".
sounds totally sound to give a smartphone 1GB ram more, same high resoltion on a smaller screen and twice as much disk space
EDIT: but please finally tell us WHAT exactly is so "interessting" adding zram or swap instead of one GB ram? you post has no information except this little claim. one might find this decision interesting of course due to its stupidity but it doesn't look that this is the source of your interest.