625/325
I have both. Have had 25s & 625s for 40+ yrs & they are great. Easy shooting & accurate. My bedside gun is a 625 4". It is also my practice revolver for combat shooting.
I got a 325PD when they first came out & have had 3. My 325 is a favorite carry gun & is easy to shoot for a light weight revolver with +P loads & very accurate at combat range.
I havn't had the Thunder Ranch since the 625s can't be beat for me or for carry the 325 is great.
What you need to do, if possible, is shoot them or similar & see which you like best, but if not, you can't beat the 625s.
PS you can almost buy 2 625s for that price