Store Simulators

I was looking into buying a new Driver.
I first went to Golftown and tried several Drivers on their simulators.
I'm 57 and an occasional Golfer (10-15 games a year)
It gave me the following information on my swing patterns...

Swing Speed 73-86 mph
Launch 19-23*
Smash 112
Backspin 2000 - 4000 rpm
Carry 156-170
Total Distance 170-185

I then went to Nevada Bob's to test out same Clubs there.
On thier FlightScope, I got the following results after several swings....

Swing Speed 93-102 mph
Launch 15-17*
Smash 130-132
Backspin 4000-6000 rpm
Carry 185-205
Total Distance 200-225

What a large variance in readings!!!!!
Nevada Bobs readings are closer to my actual Course experience.

Why so different?
It makes it difficult to judge a Clubs with such inaccurate readings.

These #'s are typical of a golfer who makes contact all over the face of the driver witch would suggest a a swingpath flaw coupled with a negative angle of attack and a driver that is way to long to hit the middle of the face more consistently.