I'm not sure how it works in $85. But in $EE LT1 4L60e has those 2 tables and performance mode is activated by a switch only available in Trans Am. It is a button on shifter but it can be added to Camaro, Corvette and B body LT1 with a switch that sends a ground to wire on PCM. I'll include the writeup in a txt file that says it may be possible in others.
If all paremeters are in the $85 XDF the one I found to make a big differance was shift times. If you look at shift times in performance mode they were all 0, but in regular mode had varied times. I had changed the times to 0 and was a much firmer shift and tranny temps went down. Could actually feel shifts like a truck or performance car instead of one big slush...
Changing shift points MPH can be very tricky. I tried this and thought was good till I datalooged and saw at highway speeds trans was shifting 3/4/3/4/3/4 so I turned and went home and got a tranny hot error code... to many other varibles to just make one table change I found. I don't know if it's possible for you to take entire trans table from a $EE but I ended up starting with a caddy 1994 V4P RPO towing option trans bin and it was great start, had raised shift points and capable of downshifting when WOT at speed where stock bin would not. That and the shift times were all I needed to turn the Buick Roadmaster big slush box to an actual trans shifting gears at higher RPM like a performance car or truck feel.
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