Like D*Alex, I am a Brooks fan. But give yourself a little time. When you start riding for the first time in years it just takes a very few days for your rear to get used to riding even on a very soft saddle. If, after a week or two, you are still gettting sore every ride, start looking at new saddles. Counterintuitively, a firm saddle is more comfortable than a very padded one. Brooks saddles are nothing but a shell of very hard leather. You can knock on them, and they sound like knocking on wood. The secret is that as you ride on them, they shape themselves to your shape and become extremely comfortable.
See you you feel in a week or so.
Regards,
Raymond
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If it ain't broke, mess with it anyway!