been in your situation (except that im choosing between 1.3E and GLX) and I ended up with GLX. Reason, that's what I need. here are my reasons:
1) I live in antipolo. hilly area. I need that 1.6 engine to get me to my destination without putting too much stress to the accelerator. (dont get me wrong vios lovers, tried to run the same route with my gf's 1.3 and I can really feel the difference.)
2) Front/Rear disc brake. Stopping power is much stronger than disc/drum combination. Also, leaving the e-break while running with drum will certainly be more problematic than disc. (tend to forget sometimes)
3) Power features. back then, 1.3 E has the only power features. so i decide to use my number 1 reason.
4) Fuel consumption. Sure, Vios hits the Lancer with a bang. But with 2km/ltr difference (mine is running at 9-11 city, pretty much normal for 1.6 m/t), I can live with it.
5) Suspension- I somehow find my suspension more fun than the vios. (my comparison is with sumulong hiway, 4:00 Am). I can turn with more speed than vios.
6) Interior space- confirmed by me (who owns 09 GLX) and my GF and cousin (gf's 06 and cousin's 08), interior space of GLX is much larger than vios (front and rear).
7) Features - Pioneer(aux-in, usb and rear output for ampli) with 4 speakers vs OEM (fujitsu) with 2 speakers, Built in alarm, 15 inch rims. you decide
even though it's old model (running from 06 with minor changes), with it's price, I find it bang for the buck!