Default SMAA vs Ultra SMAA

I installed Reshade (I wanted SMAA only) but could not find much information about my default SMAA settings:

[SMAA.fx]
EdgeDetectionType=1
EdgeDetectionThreshold=0.100000
MaxSearchSteps=98
MaxSearchStepsDiagonal=16
CornerRounding=0
DebugOutput=0


Why is this setting set as default? I could not find anyone who is actually using this setting. Is it better to use the following setting, defined as "Ultra"?

#define SMAA_THRESHOLD 0.05
#define SMAA_MAX_SEARCH_STEPS 32
#define SMAA_MAX_SEARCH_STEPS_DIAG 16
#define SMAA_CORNER_ROUNDING 25

Why setting is right for Reshade 3.1.2?

Thanks in advance.