Going to check out the Funan shops and ask their price..
It's quite interesting based on this ISO12233 crops:
Tamron 24-70mm f/2.8 Di VC USD Lens Image Quality
Based on f/2.8 (Tamron's VS 24-70L (Mark I):
24mm shows that the Tamron is SUPER sharp and wins Canon's - but Canon's better at mid-frame and corner
35mm shows that Tamron's still very sharp at center and beats Canon's, but Canon's still better at mid-frame and especially corners
50mm is very interesting - center and mid-frame is almost identical; I would say center is a draw while for mid-frame, Tamron has a very slight edge over Canon's, and for corners, Canon's had a slight edge over Tamron's
70mm would probably be Tamron's weak point - results is very similar to 50mm whereby the center and mid-frame is a close call, personally for mid-frame I find Tamron's having a very slight edge. However, the corners for Tamron seemed bad. Looks soft compared to Canon's and showing some amount of CA over here.
Personally, I think if anyone doesn't need the weather seal of Canon's nor the extreme expected performance of the 24-70L II, or doesn't wish to spend SGD$3K for the 24-70L II, The Tamron seems to be a damn good choice.

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