if you like having alpha tags for all of your talk groups ans channels then yes, you would be happy other than that I don't know of any major differences ... good luck
As someone who has done that exact thing, I can say I like my 97 much better than my 528. The alpha tagging alone is worth it, and I have a few frequencies in the area where the PL/DPL decoding comes in handy.
100% agree , I'm "spoiled" on the Alpha tagging........when it comes to that I wouldn't even question which one....528 is not a bad scanner at all . just like the Alpha