Welcome Todd and congrats on the new to you boat. I have the 96 2100SR though mine is 2bbl 5.7. Sure wish I had the EFI model
As for the SR and SR2 difference, for this model anyway it is the seating. The SR has the standard front and rear facing seats where the SR2 has captains chairs (hence the 2 as there are only 2 seats).
Mine is rated at 9 persons and I can easily fit 6 behind the glass and 3 in the bow (4 in the front and rear facing seats and the 2 jump seats next to the doghouse).
Hope she treats you well!!