When I bought my mirage, it was still a toss up between mirage glx mt and wigo g mt up until the last day.

Reasons I bought the mirage:
The looks of mirage is better. Very subjective subject though.
FC.
Mirage is already 2 years old, compared to wigo which is new. Read: you will have a more general idea of the maintenance cost and issues compared to being the first one to experience it.
Since mirage is 2 years old, you will have more accessories and parts to choose from
1.2 engine vs 1.0 engine
30K discount compared to none for the wigo (note: this 30K bought me insurance since I paid in cash, accessories, rustproofing with ziebart) - if every I bought the wigo, I think I will also shell more or less the same amount
4 stock speakers compared to 2
supposed waiting time for the wigo g
mirage gray mica was available just after 2 days
although wigo feels more spacious, i felt that it just reduced the amount of area between the passengers and the door panels. Avanza is the closest thing i can think of as an analogy.

Some thoughts about my mirage glx
- soft clutch
- very light steering.
- nvh is so so.
- comes with steel rims with hubcaps. not really a deal breaker for me though.
- you come in contact with the knees of your passenger while shifting to 5th gear.
- averages 8-12 Km/l city driving. Full tank method yields 300km per 25 liters. Need to test it more in the highway though so no data for highway fc.
- Can get up to speed very fast.
- 91 ron is the minimum fuel rating
- no abs. Not a deal breaker fror me. At this price range, I wasnt expecting any. Plus, before mirage, I am driving a 20 year old car without any abs or other high tech fancy stuffs. I am not discounting the benefits of abs but my motto is if you learn how to drive without relying on added stuffs, then it can lead you to become a better driver.

Up front, the wigo has more to offer (mags, abs, gps reads navi, etc). But I chose mirage because of the above reasons.
HTH. Happy hunting.

Whichever car you choose, I think you will be happy anyway.