personally, i think M-city wins.
1. better design
2. more layout options
3. developer branding and image (comparable but i still give TMS the edge)
4. innovations and features
5. commercial aspect and amenities

elements have guaranteed scheme but at 6% might not be attractive enough and not long enough too (2 years only wor).

m-city could be launching days after elements just to find out element real pricing.

between this and icon city, i think icon city better lah

in terms of products, both are unique but icon city have the luxury of space to play around a bit and space out their buildings/components.
location, both are acceptable and prime area but again icon city have a slight advantage in terms of accesibility and unobstructed view from surroundings.
ease of tenancy. difficult to say. maybe m-city will have more ready tenants.
other factors:
m-city faces a fair bit of competition from surrounding developers. icon city main competition will come from paradigm by wct at kelana jaya?
m-city is much nearer to kl city centre. icon city enjoys federal highway conveniences (or inconveniences depends on how you look at it).

one special note. TMS is vested in m-city, m-suites, the icon @ JTR. they will need to promote all 3 and all 3 might be fighting for the same market share. else icon city, TMS will be marketing it against other developers.
i believe their hq is dated and should be relocated. but the big question is where are they gonna go? logically should be the icon but they sold it enbloc. where they go, it bounds to bring additional associates that work with them to set up offices. and am sure TMS will at least make their own HQ flourishes.
my 2 yen.

don't get me wrong. do think m-city is currently king of the crop in that particular strecth currently.
but between icon city versus m-city, i suspect icon city would have better cap app. yield wise would be a tough call between these two.
with m-city close to city centre, it is at a dillemma. big companies will stay in city center or kl sentral. why would they go out of the golden triangle? so m-city might have some big companies but not a lot. therefore i have a feeling although rent should be higher for m-city but foresee higher turn around for tenants. think longer terms tanants with less problem will be for icon city. that's why when all are factored in, fore see yield should be kinda equal.
icon city wise would be different. it might serve as showpiece gallery for big names. they will be fighting for FH frontage as a lot (and i do mean a lot) of vehicles pass through FH everyday. much much more than akleh or jalan ampang actually. pj is kinda starving for a big corporate project.

nobody went to see the soho today??
btw, got invite for kl eco city today through email and sms.
the invite is for tmrw.

Very interesting summary.
Original spa, was for how many months completion?
If you could provide an equal summary of elements, that would be great.
Cheers.

GST?
residential under commercial title exempted lah.

tint it?