Hahaha your stress is so wonderful bro... I mean to choose between 4G93T or 4G63T.
Both are wonderful engines.
In terms of OEM new spare parts availability, 4G93T is less headache as it shares many parts with 4G93P from putra or Wira 1.8 (C99). But, it doesn't means OEM parts for 4G63T is troublesome to find. It just that it "less" available compared to 4G93T. But if you are in Klang Valley, it should not be a problem as many spare parts shop still carry the parts. I mean for "normal" wear and tear item. By the way, it would be different story (for both engines) if you need to find some major parts from chop shop, as the price sometimes quite ridiculous insane, due to less supply and high demand.
FC wise, of course 93T consumed less than 63T (provided both are still stock standard). But, once you cuit sana-cuit sini, the consumption would definitely increased.
Maintenance wise, honestly I don't think it so much different between these two engines.
If you want to use it daily, my advise is keep it stock for durability and fuel consumption. But the question is, are you able to resist the temptation not to modify it? Once you touched it, then I would say "welcome to the dark side"...
My personal preference, of course 4G63T because even stock standard, it offers you above 200hp on flywheel. Plus, if you decided to modify it, the selection of performance parts are abundance to choose.
Arrghhh... Now I miss my old days with VR4 engine... Good luck to you bro.