Hello Vic,(posted 8597 days ago)I was an AGFA 25 user for years. Since AGFA 25 met its demise, I started using Ilford PanF 50 for the last few months.
The camera I use mainly is a Mamiya 645. I really like PanF processed with Ilford ID11/Kodak D76 (very similar developer). I normally would rate Panf at ISO50 but overexpose by a stop (set my meter at ISO25) and develop Panf at 68 degrees for 10 minutes.
What I like about the film is its overall tone especially when printed on FB paper. Also, processing is very forgiving (which made me stay away from TMAX 100). I did try to use Rodinal for a while, but I like the ID11/D76 for a little subtle tones.
I even use Panf for portrait work under studio lights with great results. I can not comment on Delta 100 as I rarely use this film.
Try a roll or two of Panf, I don't think you will be disappointed. I think Panf is a sleeper of a film.