I quoted the appropriate line from CT, nuff said.
The Blade Tech Sting Ray will be fine, the Speed Rig would not have been accepted in IDPA, drop and offset holsters are specifically not allowed... except for females.
Consider that in a typical IDPA club match (in my area) you will draw your gun perhaps 6-8 times. You will do many more repeat shots (reacquiring the sight picture), shoot many more individual targets (transitioning from one to the next), shoot from several different locations and in different positions (moving around the field) and reloading (manipulating the gun.)
Speed of draw is a pretty minor factor in your overall time/score for the match. It might begin to matter when you have reached Expert and are doing all those other things very well.